請幫忙解說英文考題

1.People all consider it wise to learn a foreign language while at school. 請問it 可以改成that嗎?若不可以請告訴我原因 2.After being sent to prison ,those teens regret no having taken advice from their parents and friends. 請問為什麼要用being? 若是 being sent 改成:have been sent可以嗎? 若不可以請告訴我原因 3.The coach ,together with his hockey team... show more 1.People all consider it wise to learn a foreign language while at school.
請問it 可以改成that嗎?若不可以請告訴我原因

2.After being sent to prison ,those teens regret no having taken advice
from their parents and friends.
請問為什麼要用being?
若是 being sent 改成:have been sent可以嗎?
若不可以請告訴我原因

3.The coach ,together with his hockey team players.was warmly
welcomed when they got off the plane.
請問為什麼要用was?複數不是要用were嗎?

4.Mary put forward the proposal that program be postponed
until John came from abroad.
請問為什麼要用be ?用was可以嗎?若不可以請告訴我原因

5.Only by eating less will you lose some weight.

請問若是把only 改成If or That 可以嗎?若不可以請告訴我原因

Update: 非常感謝阿玉和Supercynic這麼詳細的解答.特別是阿玉不斷的補充意見.因此...
最佳解答給阿玉.
Supercynic您回答的也很好喔.只是最佳解答只能有1位.不好意思!
2 answers 2