Viết lại câu :
1, I have never since him before.
>> this is the first time............
2, we havenot heard from him for 2 years .
>> the last time.............
3, he has leant to play the violin since 2007
>> he stayed .................
4, we moved here 2 month ago
>> we have..............
5, How long have you lived here ?
>> when ..........
It's 2 years since I last wrote to my Penpal .
>> I haven't.............
Viết lại câu :
1, I have never since him before.
>> This is the first time I have seen him.
2, we havenot heard from him for 2 years .
>> The last time we heard from him was 2 years ago.
3, he has leant to play the violin since 2007
>> He stayed ( ***** cái gì thế ?? -.- )
4, we moved here 2 month ago
>> We have moved here for 2 months.
5, How long have you lived here ?
>> When did you started living here?
It's 2 years since I last wrote to my Penpal .
>> I haven't written to my penpal for 2 years.
1. This is the first time I have seen him.
2. The last time we heard from him was 2 years ago.
4. We have moved here for 2 months.
5. When have you lived here? ( Câu này nếu đúng hơn thì là "How long have you been living here?") 
6. I haven't written to my penpal for 2 years.
* 3. Câu này hình như sai đề rồi bạn à.
Sửa lại: He played piano in 2007 ( hay đúng hơn là :"He has played piano since 2007")
CHÚC BẠN HỌC TỐT!!
