1.Go right now or you will be late for the train.………………………………………………………………………………………………………… 2.As she is often absent from class, she can’t keep pace with her classmates.………………………………………………………………………………………………………… 3.I couldn’t write to Alice because I didn’t know her address. …………………………………………………………………………………………………………

If you go left now you will be late for the train.

2.If she doesn't often absent from class ,she will keep pace with her classmate.

3.If I know her adress ,I could write to Alice.

1. Go right now or you will be late for the train.

→ If you go left now you will be late for the train.

2. As she is often absent from class, she can’t keep pace with her classmates.

→ If she doesn't often absent from class ,she will keep pace with her classmate.

3. I couldn’t write to Alice because I didn’t know her address. 

→ If I know her dress, I could write to Alice.