把下列句子转化成现在完成进行时
问题描述：
把下列句子转化成现在完成进行时
1.i knew him last year.
i ___________________________________
2.he began to make model planes when he was seven
he _________________________________
3.they moved here in1993(live)
________________________________
4.bill began to talk on the phone five minutes ago.
bill_________________________________
5.my sister is playing with her dolls(three hours)
my sister__________________________________
答
I have been knowing him since last year.
He has been beginning to make model planes since he was seven
They have been moving here since 1993
Bill has been beginning to talk one the phone since five minutes ago
My sister has been playing with her dolls since three hours ago