现在完成时怎么用（盘点用现在完成时的常见标志词）

1.already 已经

I’ve already read this book.

2.yet已经；还

—Has he found his watch yet?

—No, not yet.

3.just刚刚

He has just come back from school.

4.ever 曾经

I haven’t ever spoken to her.

5.never从来没有

I have never travelled by plane before.

6.before 以前

She hasn’t eaten Guangdong cuisine before.

7.once, twice, three times...表示“次数”

I haven’t heard about the news three times.

8.so far至今

The football team has won the FIFA World Cup four times so far.

9.in the last/ past few years/ weeks/days...在过去的几年/周/天

Frank has made great progress in the past few weeks.

10.since自从

since+ 过去的时间点

Bob has been to Paris since Monday.

since+ 一般过去时的从句

I haven’t played rugby since I left university.

11.for 持续多久

The boy has been away from his hometown for 40 years.

12.lately, recently 近来；最近

Lately, I’ve had trouble sleeping.