Make up sentences by joining them together. Use the Past Simple, Past Continuous, Past Perfect.
1. We were late for the train. (because) Mary lost the tickets.
2. William didn’t do homework. (because) He didn’t understand the rule.
3. Dad didn’t finish his work. (because) He broke his hand.

1. We were late for the train because Mary had lost the tickets. 2. William didn’t do homework because he hadn’t understood the rule. 3. Dad didn’t finish his work because he had broken his hand.