1. have a good summer holiday 暑假过得愉快
2. come back from 从......回来
3. have/has been to 去过
4. have/has gone to 去了
5. not...any more 再也不...
6. take photos 照相
7. by the way 顺便问一下
8. take part in 参加
9. around/all over/throughout the world 全世界
10. tell sb. something about... 告诉某人关于某事
后面能接不定式作宾语的动词有：agree, ask, choose, decide, forget, hope, learn, want, wish, would like等。
We hope to get there before dark. 我们希望天黑以前到那儿。
The girl decided to do it herself. 那个姑娘决定自己做那件事。
remember to do 记住要做某事
remember doing 记得曾经做过某事
forget to do忘记要做某事
forget doing 忘记曾经做过某事
stop to do 停下来去做某事
stop doing 停止做某事
go on to do 继续做另一件事
go on doing 继续做原来在做的事
I remember seeing you somewhere before.
Please remember to turn off the light when you leave.
only a few (=few)not a few (=many)quite a few (=many)
many a (=many)
Many books were sold.
Many a book was sold.
Many,much都意为"许多",many +可数名词,much +不可数名词.
How many people are there at the meeting
How much time has we left
Many of the workers were at the meeting.
Much of the time was spent on learning
2.时间状语：recently, lately, since...for...,in the past few years, etc.
3.基本结构：have/has + done
4.否定形式：have/has + not +done.
6.例句：I've written an article.
The countryside has changed a lot in the past few years.