可以把will would 和 used to放在一起来讲
will (现在时)和would (过去时)都可以来讲
性格行为和习惯
例:Every day Dan will come home from work and turn on the TV.
At school she would always sit quietly and pay attention.
真理用will或would
例:Cold weather will kill certain plants.
During the war, people would eat all kinds of things that we don't eat now.
说话时,可以用will或would批评别人的行为或习惯。
例: She just won't do the washing up when I ask her.
可以用will表达对别人行为的不认同
例:'I feel sick.' 'Well, if you will eaat so much, I'm not surprised.
will表示对某事的假设和结论
例:You will know that Ewan and Lucy are engaged. (我假设你已经知道了)
谈论过去重复发生而且现在不再发生的行为既可以用would也可以用used to,但是句中没有给出明确时间的时候只能用used to不能用would
例:We used to play in the garden. (没有给到时间,不能用We would play...)
Whenever we went to my uncle's house, we would/used to play in the garden.
如果过去的状态现在已经发生改变,只能用used to,不能用would
例:The factory used to be over there. (现在工厂已经不在了)
假设过去某种情形用would have +过去分词
例: I would have been happy to see him, but I didn't have time.
过去假设的情形真的发生了,用will have + 过去分词
例:As it was cloudy, few people will have seen last night's lunar eclipse.