２枚目が回答になります なぜ未来完了を使わず現在完了を使うのかがわかりません 教えていただけると嬉しいです

009 You may go home if you ( ) your report. 1 finishing 3 finished 2 have finished 4 will have finished ( 松山大学)

解説お願いします。 黄色マーカー部分の式変形が分かりません。 途中式をもっと細かくして教えて欲しいです。 よろしくお願いします。

例題 284 一般項に (-1)" を含む数列の和 Sn=12−22+32-4 +52 -6°+・・・+(-1)n+1.n2 を求めよ。 思考プロセス 式を分ける 717 符号が交互に変わることから、2項ずつ組にして考える。 Sm= =(12−22)+(32-42) + (52-62) +...... 場合に分ける **** 最後も組 → (12−22) + (32-42) +... + □2+ ○ 2-2) (nが偶数のとき) (12-22)+(32-42) + ··· + (O² - 2) +[ 最後余る Action» 一般項に(-1) を含む数列は,nの偶奇で場合に分けよ 700 解 (ア) nが偶数のとき, n=2m(m = 1, 2, 3, ･･･) とおくと (nが奇数のとき) Sn = S2m = (12-22) + (32−42)+(52-62) ... +{(2m-1)^2-(2m) m m 1 = {(2k−1)² - (2k)²} = Σ (−4k+1) 517- k=1 =-4・ 2 k=1 -m(m+1)+m=-m(2m+1) (+)Kampin n=2mより, m= Sn == 1 1 -n であるから n(n + 1) (イ) nが奇数のとき, 10 n(n+1) Ratsportsof+”の式で表す。 n=2m-1(m= 1, 2, 3, ･･･) とおくと Sn=S2m-1=Szm+ (2m)2 =-m(2m+ 1) + 4m² =m(2m-1) n=2m-1より, m= 11/12 (n+1) であるから を3以上の奇数として, S2m+1=S2m+ (2m+1)^ と考えてもよい。 (ア) の式を利用する。 Szm=Szm-1-(2m)2 ―m(2m+1)+4m² =m{-(2m+1)+4m} =m(2m-1) Sn=1/12 (n+1){(n+1)-1}=1/21n(n+1)1-8-201 1-1/2m(n+1) (wは偶数) to 1) 11/12m(n+1) ( n は奇数) re (ア)(イ)より Sn= すなわち Sn = (-1)+1. 1½n(n+1) このまま答えとしてもよ い (1)+1 J-1 (n が偶数) (1 (nが奇数)

どうして②が答えなのですか？

2009 00 You may go home if you ( 1 finishing ③ finished > your report. 2 have finished 4 will have finished ( 松山大学)

20番の問題で僕は3番のmay had goneを選んだのですが答えは2番のmay have goneでした。これは過去完了の推測だったって認識で合ってますか？詳しく教えて頂けるとありがたいです

eat e d re those days and, towards this end, (17) Columbus went on a great slave raid in the Americas in 1495. It is believed that Columbus took up to fifteen hundred native American people to become slaves. Men, women, and children were gathered up and sent to cages where Columbus picked five hundred of the healthiest ones to send back to Spain. During the trip back to Spain, two hundred of the captives died en route*. The ones who made it to Spain were sold into slavery by the church. (18) So, now we know that Christopher Columbus was not a brave pioneer who went to a new world () discovery and fame, but a person who was looking to make himself rich. He ( ) to the Americas looking for gold. [(19)[] (20 but he found a people who he sold into slavery for his own profit. Not quite the hero the history books made him out to be, wouldn't you say? (注)en route 途中で 下線部(1)"all across” の意味に最も近いものは次のどれか。 解答番号は

なぜshowにnがついているのですか？

Some countries are helping each other to use renewable energy. *Kenya has built *geothermal power plants with the help of Japan. These power plants use the heat of the earth. Japan has shown the engineers in Kenya how to build these plants and taught them how to use them. Kenya has 25 set a goal of increasing the electricity the plants can make. They are hoping to reach this goal in the future. With Japan's help, the people of Kenya have ( 3 ) trying hard for the economic growth. This kind of international help is important when many countries understand global problems and build a better world.

なぜgrowにthがついているのですか？

5 new technologies and *cooperation between important. Let's share three stories to learn the fact. In 2016, *Portugal tried a test for energy. They used only renewable energy such as wind, water, and sunlight. They could produce all the electricity that was necessary for the whole nation. Now, the government and companies are ( D ) together to make some new *power plants. They want to use more renewable energy because the energy can save oil 10 and protect the environment. The people think using renewable energy ② ]. Their goal is to stop pollution, have more energy, and get *economic growth. is In *Hungary, a small company is trying a different plan for producing electricity. Instead of building big power plants, they are thinking about something much smaller. The company is designing *solar panels made

19ってこの理論でいくと、whenも時の副詞節を導くから未来のことでも現在形ですか？ なんか違うような気がしますが、違うとしてなぜ違うか分かりません。

第1章 時制 19~25 23 Part 1 文法 22 Part1 交流 exts Point 008 ステージ] 法・語法 19 I'll be at home watching TV until ( ). 19. until 節 未来のことでも現在時制 you come back ② you be back Uniog 出ポイン you will be back you will have been back 〈拓殖大> Point 008 時・条件の副詞節一未来のことでも現在時制 接続詞 until / before/after/ as soon as などで導かれる節は時の副詞節 になるので、未来のことでも現在時制を用いる。 標準 20 持条件の副詞節未来完了は用いず現在完了 標準 試英語の 20 When I ( ) a thousand English words, will I be able to read 語法」「イディン an English newspaper? “クセント・発音 I am learning で効率的に食い ③ will have learned 2 have learned ④ will learn <東北学院大 > 本書 Point 009 へと導く厳 時条件の副詞節では未来完了は用いず、 現在完了を用いる。 主節の前に用いられる when 節は副詞節。 文中で用いられる場合の見分けは次のPoint 009 参照。 Point 009 文中で用いられるwhen 節/ if節の見分け 文中で用いられる when 節/if節は必ずしも副詞節とは限らない。 その見分け については, 【整理2】の内容を正確に押さえておこう。 tning 中堅大学で は「合格ライン ができます。 21 Can you give me a call when you ( ① arrive ② arrived ③ will arrive ) at the airport? 21 when 節 「･･･するとき」 ④ are arrived <中央大) when 節 「いつ･･･するか」 -名詞節。 未来のことは未来時制 時の副詞節。 未来のことでも現在時制 標準 標準 出項目を211 目を218のポー かです。 22 口 Mr. Tanaka is out now, and I don't know when he ( office. ) in the 23 of ① will be back 2 is back 24 節 「もし……すれば」 条件の副詞節。 未来のことでも現在時制 標準 if節 「･･･するかどうか」 名詞節。 未来のことは未来時制 準 また情報 ③ is being back ④ be back 【整理 つけています 覚える」べき □■ nice. きます。 ① will have been ② is 英作 24 ■ 英作文 □ 解」 「英作 She is not sure if he ( overseas students. ①comes ② had come 23 We will go to the open market tomorrow if the weather ( ) to today's welcome party for the <愛知大 > 25 時の副詞節の when 節なので, 未来時制ではなく現在時制 ③ were had been < 東洋大 > 3 will

英語のdueとwillの違いを教えて頂きたいですm(_ _)m どちらも未来の予定を意味するみたいです。

オーレックス英和辞典 (第2版) LEX due /dju:/ 同音語 dew) 形名副 中心義当然そうあるべき 一形比較なし 1 叙述 a(...日[時]に) 予定された, 到着予定の The train is due in ten minutes. 列車はあと10 分で到着する予定だ I think the director is due back soon.\所長は じきに戻って来ると思います When is her baby due? 彼女の出産はいつの予 定ですか The report is due out soon. その報告はもうす ぐ発表される予定だ b〈...する〉予定 [約束]で, <...する〉はずで〈to do〉;〈...を〉予定されて,当然 <...の〉はずで <for〉 She is due to be promoted. = She is due for a promotion.彼女は昇進するはずだ The trade center is due to open next month.\ 貿易センターは来月開館することになっている We're due for some snow.\雪になるはずだ

下線部Dと答え.ウはなぜ同じ用法なんでしょうか 教えてください🙏

closer to reality. Researchers have investigated the use of electricity to stimulate vision for nearly half a century. In the 1960's, a *physiologist implanted 80 electrodes on the surface of a blind person's *visual cortex, a region at the back of the brain. Wireless stimulation of the electrodes made the patient see spots of light known as *phosphenes. This is the first stop for visual signals coming from the eye. (D) By the 1980's, a crop of *ophthalmologists began considering a narrower and seemingly easier-to-solve problem: making *prostheses for the eye. They suggested that degrade *photoreceptor cells called *rods and cones, still leave large portions of the retina intact even after a patient has become totally blind. The way to stimulate the remaining functional cells was proved *feasible in the mid-1990's. A device consisting of a tiny video camera perched on the bridge of a pair of glasses, a belt-worn video processing unit, and an electronic box, was developed recently. The electronic box issues signals to an implant behind the patient's ear that has wires running to a grid of 16 electrodes affixed to the output layer of the retina. The video processor wirelessly transmits a simplified picture of what the camera images to the box, and then the retinal implant stimulates cells in a pattern roughly reflecting that information.

この答え合ってますか？ 違ったら解説、答え教えて欲しいです。

5 次の英文は,中学生の静香(Shizuka) と韓国からの留学生クワン (Kwan) が夕食を食べているときの会話です。 これを読んで問いに答えなさい。 Shizuka: Kwan, I made this oden. Please eat it Kwan ① : Shizuka, your oden is very good. ② A B it becomes cold. Can I ask you a question? When you eat rice, you have your bowl in your hand. Is that OK in Japan? In Korea we don't do that. Shizuka: That's interesting. In Japan this is the right way of eating. Kwan : I didn't know that. By the way, what are the long chopsticks near the pot? Shizuka: They are tori-bashi. We use them to take food from big dishes. When we to dinner, we often use them. If we use tori-bashi and show our special feelings to our C guests guests, they will be happy. We think that their feelings are ( ) important. ( Kwan ③ : Is that so? When we have guests, we think that they are members of our family, so we use our own chopsticks. If we do so, they will be happy. Shizuka: Wow! People in Korea don't use chopsticks like Japanese people. But both of us want to Kwan make guests happy. : Yes, I think so, too, Shizuka, when we eat with our guests in Korea, we also try to talk a lot to make them happy. Shizuka: I see. That's a good idea. Kwan, let's enjoy talking a lot during dinner. (注) oden おでん bowl 茶わん right way 正しい方法 tori-bashi 取りばし big dish (es) 大皿 guest(s) chopstick (s) はし pot なべ (1)会話の内容から考えて, A ] に適当な1語を入れて、 下線 ①を日本語に直しなさい。 A (2) B 」に「あなたは私の母よりも料理が上手です。」という意味を表す英文を書きなさい。 (3) 下線②が表している内容を具体的に日本語で書きなさい。 (4) Cに入る最も適当なものを,ア~エから選びなさい。 ア join イ visit ウ share I invite (5) 下線③が 「彼らの気持ちが一番大切です」 という意味になるように,( )にそれぞれ適当な1語を書きなさ い。 (6) 下線④のようにクワンが述べている理由を、日本語で書きなさい。 (7)本文の内容に合うように、次の文の( 内に指定された文字で書き始めること。 ② ⑥に入る最も適当な語を1話ずつ書きなさい。ただし,( There is a (d) way of using chopsticks in Korea and Japan. But both Korean people and Japanese people ⑥ (h ) that their guests will feel happy. b