1. "I had to" walk home last night. There were no buses.
2. Itʻs late. ".I must go now."
3. I don't usually work on Saturdays, but last Saturday.I had to..work.
4. I must...get up early tomorrow. I've got a lot to do.
5. I went to London by train last week. The train was full and I had to..stand all the way.
6. I was nearly late for my appointerment this morning. I had to..run to get there on time.
7. I forgot to phone David yesterday. .I must...phone him later today.