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[1]
1. (though) ※though+S+V~ Sが~するけれども
2. (little) ※little:ほとんど…ない<部分否定>
3. (Not every) ※every+単数名詞
4. (unless) ※unless+S+V~ Sが~しない限り
5. (Not all) ※Not all(S:複数) of them [are](V) → 主語は複数 → Not [all]
[2]
1. [Not all of the classmates] agreed with the teacher’s plan for the school trip.
2. Mari asked me [if I had enjoyed my birthday party].
3. He talks about baseball games [as if he were a sports critic].
4. If he hadn’t seen that movie, he [would not have wanted to be] a movie director.
5. We left plenty of pet food in the room [so that our cat would not starve] while we were away.
参考にしてください。