Chia động từ ở thì quá khứ đơn hoặc quá khứ tiếp diễn

1. was playing - entered

`->` S + V(past continuous) when + S + V(simple past).

2. was studying - came

`->` S + V(past continuous) when + S + V(simple past).

3. was washing - rang

`->` S + V(past continuous) when + S + V(simple past).

4. was eating - were drinking

`->` S + V(past continuous) while S + V(past continuous).

5. was watching - jumped

`->` S + V(past continuous) when + S + V(simple past).

Giải thích thêm:

- Past continuous (quá khứ tiếp diễn): S + was/were + V_ing.

- Simple past (quá khứ đơn): S + V(ed/ cột 2).