现在完成时与现在完成进行时.ppt

mmar and usage
Part a
Present Perfect Tense
Form: have/has done
1我们用现在完成时来讲发生在过去的动作,
但是对现在有影响。
They have cleaned the classroom. they cleaned
the classroom and the classroom is clean now.)
I have finished my homework.(l finished my
homework and am free now)
The boy is very happy.
The boy has caught(catch)
a bird
Connection with the past: The boy
caught a bird Connection with the
present: The boy is happy.
Look, the window is open. Eric opened the
window just now
Eric has already opened (already open)
the window
Connection with the past: Eric opened
the window
Connection with the present: The window
is open.)
The boys are tired. They have just played
Gust play)a ball game.
( Connection with the past: The boys
played a ball game.
Connection with the present: The boys
are tired.)
2现在完成时还可以表示动
作发生在过去一直延续到
现在。常与一段时间连用
的器端删
Daniel has lived (live) in
Beijing since he came to China.
came
has lived
past
now
future
He hasnt given me any more trouble since
then
We have discussed the topic for 3 days
They have made rapid progress during/in the
past few years