I taught here last year变为现在进行时

题目

I taught here last year变为现在进行时
变为现在完成进行时
I taught here last year
He began to make model planes when he was seven
they moved here in 1993(live)
Bill began to talk on the phone five minutes ago
My sister is playing with her dolls (three hous)

答案

I taught here last year
==I have been teaching here since last year.
He began to make model planes when he was seven
==He has been making model planes since he was seven.
they moved here in 1993(live)
==They have been living here since 1993.
Bill began to talk on the phone five minutes ago
==BIll has been talking on the phone for five minutes.
My sister is playing with her dolls (three hous)
==My sister has been playing with her dolls for three hours.