would
单词辨析：
指过去经常做某事或在过去某段时间里做过某事，含现在不再这样之意，强调今昔习惯的对比；此外，used to 除可后接动作性动词（如 work, eat, stay 等），也可后接非动作性动词（如 like, be, have等），以说明过去经常存在的情况或状态。
I used to enjoy gardening, but I don't have time for it now.
我过去喜爱园艺，但现在没时间去弄了。
We used to play hide-and-seek when we were children.
我们儿时常玩捉迷藏游戏。
He used to go to that private school.
他曾在那所私立学校就读。
used to 的疑问形式用 did 构成，但此时要用 use to。
Did you use to go to church regularly?
你以前经常去教堂吗？
在否定句中用 didn't/did not use to 表示，也可用 never used to 表示。
She didn't use to eat meat.
她以前不吃肉。
They never used to ask what his favourite dish was.
他们以前从来不问他最喜欢吃什么菜。
在正式的英国英语中也可以说 used not to。
Planes used not to land here.
飞机以前不在这里降落。
表示过去经常做某事，只强调过去的重复动作，而不能用于今昔习惯的对比，也不可后接非动作性动词。
His grandparents would take care of him when his parents were busy.
他父母忙的时候，总是祖父母照顾他。
On summer evenings they would have dinner in the garden.
夏天的晚上他们经常在花园里吃晚饭。
相关例句：
My daughter would have been 17 this week if she had lived
我女儿要是还活着的话，这周就17岁了。
Would you like a drink?
想喝一杯吗？
If I were you I would simply ring your friend's bell and ask for your bike back
如果我是你，我就会直接去按你朋友的门铃，把自行车要回来。
I would have liked a life in politics
我本想从政的。
He made a promise to his great-grandfather? That would have been a long time ago
他曾向他的曾祖父许下承诺？那准是很久以前的事情了。
Within ten weeks of the introduction, 34 million people would have been reached by our television commercials.
在推出10周之内，可能会有3,400万人看到我们的电视广告。