Question

Example 0. She (read) a book when he (come). Answer 0. was reading, came. 1. I (walk) the dog when I (see) my friend. 2. She (do) her makeup while she (talk) over the telephone. 3. Peter (read) while I (have) lunch.

Answer 1

1) I was walking the dog when I saw my friend.

2) She was doing her makeup while she was talking over the telephone.

3) Peter was reading while I was having lunch.

Answer 2

Here are the answers to the sentences you provided:

1. I was walking the dog when I saw my friend.
2. She was doing her makeup while she was talking over the telephone.
3. Peter was reading while I was having lunch.