rewrite these sentence...

`nacutihe.vt`

`1.` It's been a week since I last met Jennie.

I last met Jennie a week ago.

The last time I met Jennie was a week ago

`2.` I haven't visited Hoi An ancient since I was twenty years old.

The last time I visited Hoi An ancient town was when I was twenty years old.

I have not visited Hoi An ancient town since I was twenty years old.

`3.` It/This is the first time I have seen such a cute baby.

`4.` It/This is the first time I have visited Nha Trang.

`5.` How long has Phong lived in America ?

`- - - - - - -`

`***` S + have/has + not + PII + for ../since .. : Đã không làm gì được bao lâu, kể từ khi ...

`->` It is/ It has been + time + since + S + last + V_QKĐ : Đã ... kể từ khi lần cuối làm gì

`->`  S + last + V_QKĐ + ..ago/ when .. : lần cuối làm gì khi nào

`->` The last time + S + V_QKĐ + was + ..ago/when ../in .. (Lần cuối làm gì khi ..)

`***` It/This is the first time + S + have/has + PII : Lần đầu làm gì

`->` S + have/has + not/never + PII + before. (Chưa từng làm gì trước đây)

`***` When did + S + start + to V/V_ing ? : Đã bắt đầu làm gì khi nào

`->` How long + have/has + S + PII ? : Làm gì được bao lâu

1. I last met Jennie a week ago.
2. I haven't visited Hoi An ancient town since I was twenty years old.
3. This is the first time I have seen such a cute baby.
4. This is the first time I have visited Nga Trang. 
5. How long has Phong lived in America?  


HTHT: S + have/has + V3/ed
QKĐ: S + V2/ed


`@` S + hasn't/haven't + V3/ed + O + for + time
= S + last + V2/ed + time + ago


`@` S + have/has + never + V3/ed + ... + before
= This is the first time + S + have/has + V3/ed + O

`@` When + did + S + start + V-ing + O?
= How long has/have + S + V3/ed + O?