问题描述：
把下列句子转化为现在完成进行时态
1.I learned the guitar last year.
2.He began to make model planes when he was seven.
3.They moved here in 1993(live)
4.Bill began to talk on the phone five minutes ago.
5.My sister is playing with her dolls.(three hours)
1.I learned the guitar last year.
2.He began to make model planes when he was seven.
3.They moved here in 1993(live)
4.Bill began to talk on the phone five minutes ago.
5.My sister is playing with her dolls.(three hours)
问题解答：
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