1 It / start / rain/we / not/go out

`->` It started to rain so we didn't go out.

2 He / tired / he /come /home/early / yesterday

`->` He was tired so he came home early yesterday.

3 lan / lazy / she / fail / the exam

`->` Lan was lazy so she failed the exam.

4 The weather / nice / we / have / wonderful trip / Da Lat

`->` The weather was nice so we had a wonderful trip in Da Lat.

5 Mary / want / meet / him / she / go/shool/early yesterday

`->` Mary wanted to meet him so she went to school early yesterday.

* So: nên

`1.` It started to rain, so we didn't go out.

`->` Trời bắt đầu mưa nên chúng tôi không ra ngoài.

`2.` He was tired, so he came home early yesterday.

`->` Anh ấy mệt nên hôm qua anh ấy đã về sớm.

`3.` Lan was lazy, so she failed the exam.

`->` Lan lười học nên cô ấy đã thi trượt.

`4.` The weather was nice, so we had a wonderful trip in Da Lat.

`->` Thời tiết rất đẹp nên chúng tôi đã có một chuyến đi thật tuyệt vời ở Đà Lạt.

`5.` Mary wanted to meet him, so she went to school early yesterday.

`->` Mary muốn gặp anh ấy nên hôm qua cô ấy đã đến trường sớm.

`---`

Giải thích:

+) Các sự việc trên đều là sự việc đã xảy ra nên ta chia quá khứ đơn

+) Trước so thường có dấu phẩy.