Complete the sentences using the correct form of the verb in brackets. Past tenses.
1. When I (see) your mother yesterday, she (cross) the street.
2. While I (sweep) the floor, my husband (do) the washing-up.
3. My students (never see) the Big Ben before, until we (go) to London last summer.
4. Robert (water) the plants in the garden when I (call) him for dinner.
1. When I saw your mother yesterday, she was crossing the street.
2. While I was sweeping the floor, my husband was doing the washing up.
3. My students had never seen the Big Ben before, until we went to London last summer.
4. Robert was watering the plants in the garden when I called him for dinner.