句型转换。
Jim is at home. (改为否定句)
Jim _____ _____ at home yesterday.
He sang an English song yesterday. (对画线部分提问)
What _____ he _____ yesterday?
They had a good time at the party last night. (改为同义句)
They _____ _____ at the party last night.
He can swim now. (改为否定句)
He _____ swim when he was 7 years old.
They played basketball on the playground yesterday afternoon.(对画线部分提问)
_____ _____ they _____ on the playground yesterday afternoon?