When he was four years old,he___sing several English songs?A.could B.can C.may

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When he was four years old,he___sing several English songs?A.could B.can C.may
When he was four years old,he___sing several English songs?A.could B.can C.may

When he was four years old,he___sing several English songs?A.could B.can C.may
A 表示他在四岁时能够唱英语歌 并且使用过去式

A 主句与从句要时态一致

He was able to speak english when he was four years old. was able to He was able to speak English when was able to is

答案为B。表示一般的情况,事实,用一般现在时就可以。表能力。

A吧
过去式

A 过去式 前后时态一致!