1枚目は答えが3でした、どうして4はダメなんでしょうか... 2枚目は答えが2でした、どうして4はダメなんでしょう...過去形でもいけませんか...？

86 Dorothy isn't in the office; she ( I can be having 3 might be having ) coffee in the cafeteria. 2 can have ④might have [4] 87 Alice ( ) there yesterday, but we didn't see her. 1 1 ✓ 88

この問題の(3)と(4)の解き方を教えてください！

すべて UP.70 【代入法】 3 次の連立方程式を代入法で解きなさい。(7)用 2(1) y=-2x x+y=-6 (x,y)=( x = -2y+1 31232(3) 3x +4y=11 V: OET VE (08)= (x,y)=( E いろいろな連立方程式】 ない UP.80 Lv1 (3)2(2) 各7点(28点〕 UP.80 y=3x-4 x+3y= 18 obluǝ buic UP.80 y = 3x + 1 (③(4) y=8x-9 (x,y)=( (x,y)=( UP.80 Final Check! Campus A 各7点[14点〕

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17. I really must go and see the dentist. One of my teeth ( ) for weeks. (共立女子大) Dached 3 has been aching 2aches is aching 18. I ( my homework for an hour when my mother came home. (大阪経済法科大) alle Dam doing was doing have been doing had been doing 19. She () in the accounting department for 10 years by the end of next month. has worked will have been working @has been working is working (国士舘大) (杏林大) had wanted 最 20. When I woke up this morning, I decided I ( ) to get in shape. @want @wanted will want 21. Yesterday in science class, I learned that water ( ) at 100 °C. (大谷大) ①was boiling boiling boils buil 22. I will ask him about it as soon as he ( ) back. (国士舘大) ①come ②comes will come would have come 23. I'll be back before it ( ). (立命館大) Drain rains ③will rain would rain ☐

赤線の部分がわかりません。

本冊 p.473 で紹介した,三角形の成立条件|b-ck<a<b+c ①が成り立つときa>0,b>0,c>0である理由を考えてみよう。 [検討 ① で, 16-c|≧0であるから,a>0 がわかる。 b≧c のとき,①から b≧c であるから b-c<b+c b>0 よって c>0 b<cのときも、同様にしてb>0, c0 が示される。 ①について 練習 (1) AB=2, BC=x, AC=4-xであるような △ABC がある。 このとき, xの値の範囲を求め ③ 86 よ。 [ 岐阜聖徳学園大) (2)△ABCの内部の1点をPとするとき,次の不等式が成り立つことを証明せよ。 AP + BP + CP < AB+BC+CA (1)△ABC が存在するための条件は 2(x-2)<2<4 三角形の成立条件 \b-c| <a<b+c ←|2(x-2)|=2|x-2| |x-(4-x)| <2<x+(4-x) すなわち 12(x-2)<2から |x-2|<1 よって -1<x-2<1 ゆえに 1 <x<3 a0 のとき また, 24は常に成り立つ。 したがって 1 <x < 3 別解 △ABC が存在するための条件は x+(4-x)>2, (4-x)+2>x, 2+x>4-x が同時に成り立つことである。 90 この連立不等式を解いて 1 <x< 3 40 PD+DC> PC (2) 直線 BP と辺 AC の交点をDとする。 △ABD において AB+AD>BD また,△PCD において ①+② から AB+AD+PD+DC>BD+PC AB+(AD+DC)+PD>(PB+PD)+PC ゆえに よって AB+AC> PB+PC ..... 同様に BC+BA >PC+PA ...... A ... ① D ...... ② P AQB AO \x\<α-a<x<a -0 三角形の成立条件 (b+c>a c+a>b la+b>c ←三角形の2辺の長さ 和は、他の1辺の長さ り大きい ←a> b, c > dならに a+c>b+d ←両辺にPDが出て 消し合う。 CA+CB> PA+PB ③~⑤の辺々を加えると 2(AB+BC+CA)>2(AP+BP+CP) よって AP+BP+CP < AB+ BC + CA ←両辺を2で割る 練習 (1) 鈍角三角形の3辺のうち, 鈍角に対する辺が最大であることを証明せよ。 ③ 87 (2) △ABCの辺BCの中点をMとする。 AB AC のとき 新品 <BAM <<CAMである

2番の「隣人なかなりの美声の持ち主だった」という問題で答えはsingなのですがheardと過去形が前にあるのにsingが過去形にならない理由が分かりません。分かる方教えていただきたいですm(_ _)m

His mother (Spa) him (learn 2. 状況 隣人はかなりの美声の持ち主だった。 I heard 日本語の意味 the piano. ) lo jol a mid ( ) (s) ) the neighbor (sang ) a song in the bathroom. ( )の中に適切な語を入れて, 言い換えを完成させなさい。 本日 1 Cho cano this song and she became famous all over the world. da idlayed oW

並べ替えて意味の通る分にしたいのですが、どの順番か分かりません。 わかる方教えてください🙏

提供するイミディエイ即座の保護 配達する These hastily built shelters provide immediate protection and safety for the world's 人命救助の アラウ 支援する救助 ボルボ傷つきやすい・弱い most vulnerable people. (1) (allow / deliver / UNHCR* / to /aid/eamps / lifesaving) like food, water and medical attention during an emergency. * UNHCR 国連難民高等弁務官事務所。 10

教えて下さい！

B. Complete the paragraph with words from the box. connection damaged improved normally sharp 1 2 In his book Musicophilia, brain scientist Dr. Oliver Sacks looked at the between music and the brain. He wrote about how music the lives of musicians, hospital patients, and ordinary people. Dr. Sacks also shared the experiences of different people. He gave an example of a man by a lightning strike, which-strangely-left whose brain was 3 him wishing to become a musician at age 42. Another interesting example was of a man whose memory 4 lasted only seven seconds, except when he listened to music. When this happened, his mind became very 5- with a near-perfect memory.

7問わかる方教えてください🙏

17. I really must go and see the dentist. One of my teeth ( Dached has been aching aches is aching ) for weeks. (共立女子大) 18. 1() my homework for an hour when my mother came home. Dam doing have been doing was doing had been doing (大阪経済法科大) 19. She () in the accounting department for 10 years by the end of next month. @has worked will have been working has been working is working 20. When I woke up this morning, I decided I ( ) to get in shape. @want ②wanted 3 will want (国士館大) rode 11 8 (杏林大) had wanted 最頻 (大谷大) boil 21. Yesterday in science class, I learned that water ( ) at 100°C. was boiling boiling Ⓡboils 22. I will ask him about it as soon as he ( ) back. ①come ②comes 23. I'll be back before it ( ). Drain ②rains (国士舘大) will come would have come (立命館大) ③will rain would rain ☐ ☐

英文法･語法問題600です 5問教えてください

( 神奈川大) ④knowing id 13. My best friend and I ( ) each other since we were five. ①have known 2 know 3 knew 14. My friend from Africa () snow until he came to Japan. (日本大) ①has not seen 3 had never seen was never seeing to Joq will have s e seen mi ai odieX SC guiclem ai 15. When Mary was introduced to Mrs. Smith, she realized she ( 2 was meeting Dis meeting ③3 will meet ) her before. olidyed met? 4 had met (東海大 ①have lived 16. At the end of next month, we ( ) here for three years. 3 will have lived 2 live (立命館ナ will live becast at D 17. I really must go and see the dentist. ijem gnols ( Dached One of my teeth ( ) for weeks. 2aches (共立女子 3 has been aching is aching 法

至急です。試験範囲なので教えてください🙏🙏

第1章 □ 13. My best friend and I ( ) each other since we were five. (神奈川大) ④knowing ①have known 2 know 3 knew 24. If it ( ) on Thursday, we will not go to the beach. (西南学院大) ids ①rains would rain ③rained has been rained 14. My friend from Africa ( ) snow until he came to Japan. (日本大) ago. ①has not seen 3 had never seen Joq was never seeing will have seen al ofie S 25. I don't know if our teacher ( ①camera ②come ien ( ) back next week.d( 3comes (東北薬科大) 4 will come gablem at 時制 15. When Mary was introduced to Mrs. Smith, she realized she ( ) her before. elids ③will meet was meeting 3 Dis meeting □ 16. At the end of next month, we ( ) here for three years. had met (東海大) ①leave 3. (this stone adoleft 30 (立命館大) 27. I wonder when he ( ①come ) next. ①have lived live ③will have lived will live betes 26. Turn off the lights when you (br) the room. ( ③will leave cause it ) yded ed Oleaving D (日本大) smod v②coming (nedloqa had come \I\e will come (日本大) ☐ 4.1 was nger in the shopping mall. Dspoken by 17. I really must go and see the dentist. One of my teeth ( ) for weeks. @being spoken Dached 2aches 3 has been aching is aching 18. I ( ) my homework for an hour when my mother came home. (大阪経済法科大) gile@ Dam doing 2 was doing 3 have been doing had been doing (共立女子大) D gaiblod od lliw bled ad lliw blod Hiw 9 ) noitools Intone A 20 Baiblod ai① 5. The room should ( Obe kept ) clean at all times @batept) bear of seeded over Y are gnitisqet need asdⓇ gairinger ai 6. When I came other hat the 東北福祉大) s building Obeing built .89mit in1976e 19. She ( ) in the accounting department for 10 years by the end of next month. ①has worked gatiog me 7. Michael ( ③3 will have been working has been working is working (国士舘大) gnibrawe need asd go ) 1015xib adf to bebrown ead bbw gingle Player three wensed and @has selected has been selecting trode) 1.8 810 Writing 20. When I woke up this morning, I decided I ( ) to get in shape. 杏林大) )vedT 8. C ①want ②wanted 3 will want 4 had wanted sqft 18beads ( 最頻出の項目を、もう一度書いて覚えよう。 ) awon ai dtime.eM nd that ☐ 1. I got your letter last week. I'm sorry (didn't / haven't/back/I/ written). boiling 21. Yesterday in science class, I learned that water ( ) at 100°C. ①was boiling 3 boils (大谷大) (1語不要) (武蔵大) 4 boil ☐ 2. (began / begun / the class / already / had) when I arrived. (1) 22. I will ask him about it as soon as he () back. ⑪come 2 comes bib@ ③will come (国士舘大) wen & Jdgood o 4 would have come (国士舘大) bassaid □ 3. もし天気 (the weather) が良ければ, 私たちは明日泳ぎに行く。 (1語不要) (防衛医科大) 23. I'll be back before it ( Drain ). ②rains wad nodw exey evil Tol nobno ni ( 3 will rain 4would rain ed (立命館大) We (the swimming / weather / will/be/is/tomorrow/go/if) fine. 6