2 câu trả lời
1. The children (play) ___________________ soccer at 4 o'clock yesterday.
$\longrightarrow$ was playing
$\longrightarrow$ Cụm từ nhận biết: 4 o'clock yesterday $\Leftrightarrow$ QKTD
$(+)$ S + was/were + V-ing.
$(-)$ S + was/were + not + V-ing
$(?)$ Was / Were + S + V-ing?
Yes, S + was/were.
No, S + wasn’t/weren’t.
1. The children ( play ) .played.. soccer at 4 o'clock yesterday.
Qúa khứ đơn : S + ed