Lesson 4:An excited trip

6.29 Thursday

现在完成时:表示动作现存的结果，或者过去发生的事对现在的影响。

I've planted fourteen rose bushes so far this morning.

I have lived here for several years now and I've made many new friends since I have lived here.

He has retired now.他现在已经退休了

I haven't been very successful so far.

Have you ever been to Australia?

Have you read any good books lately?

The train has not arrived yet.