51
remember/forget to do sth 记得/忘记做某事(没有发生)
Please do remember to post a letter forme.务必记得帮我寄信。
remember/forget doing sth 记得/忘记做过某事
I remember telling you the news before.我记得曾经告诉过你这个消息。
52
see sb do sth 看见某人做某事(结果)
see sb doing sth 看见某人正在做某事(正在进行中)
be seen to do sth 做某事被看见
I saw them play football last weekend.
I saw her cleaning the classroom.
I saw him get on the bus.= He was seen to get on the bus.
53
something to eat/drink 一些吃/喝的东西(词不定式放在something等后修饰这些词)
I need something to eat. 我要一些吃的东西。
54
spend some time (in)doing sth /on sth 花费时间做某事(注意动词要用ing形式)(常考)
I spent 2 hours on homework.= I spent 2 hours in doing homework.
spend some money on sth/doing sth 买……花了多少钱
I ofen spend some money on the book.
I ofen spend some money buying the book.
55
Sth is hard/difficult/easy to do . 做好某事很难/容易