1<Whoever> does it makes no difference.为什么不能用No mater who ?
2I am sorry I haven't done as much as I could.是固定用法么
3Take care <that> your classmates should not misunderstood your ideas.为什么不可以用so that ?
4I would not have made such pregress if<it had been for>his help.为什么这样用?
5He was surprised <when >he found himeself the only boy there.用as soon as 为什么错呢
6Ships carry lifeboats so that the crew can escape <if >the ship sinks.为什么不能用in case
7Patient as he was 这是一个什么用法``
谢谢啊```感激```知道这个途径真好```