`1.` Anna stated choosing wedding dress last month.

`=` Anna has chosen wedding dress since last month.

`→`S + started/began + Ving/To V + thời gian

`=` S + have/has + VPII + for/since + thời gian

`2.` The last time I heard about Suri was 5 months ago.

`=`I haven't heard about Suri for 5 months.

`→`The last time + S last + V quá khứ + was + time + ago

`=` Phủ định của hiện tại hoàn thành : S + have/has not + VPII + for/since thời gian

`3.` I have never seen a better film than this.

`=`This is the best film I have ever seen.

`→`S + have/has never + VpII + Adj + N + than + S (chỉ vật)

`=` This is/It is + the + So sánh nhất + N + S + have/has (ever) VpII

`4.` She last sent letters to me last week.

`=`She hasn't sent letters to me since last week.

`→`S + last + V2/ed + time

`=` Phủ định của hiện tại hoàn thành : S + have/has not + VPII + for/since thời gian

`5.` The last time I fell off my bike was when I was small.

`=`I haven't fallen off my bike since I was small.

`→`The last time + S last + V quá khứ + was + time + ago

`=` Phủ định của hiện tại hoàn thành : S + have/has not + VPII + for/since thời gian

1. Anna has chosen wedding dress since last month ( S+has/have+V_qkpt+since+mốc tgian)

2. I haven't heard about suri for 5 months (  S+has/have+V_qkpt+ for+khoảng tg)

3. This is the first time i have seen a better film than this ( this is the first time+HThT: lần đầu tiên làm gì)

4. She hasn't sent letters to me since last week ( tương tự )

5. I haven't fell off my bike when i was small ( tôi đã không còn ngã xe đạp từ khi tôi còn nhỏ)