题目内容
【题目】He could catch the ball. (改为否定句)
【答案】He couldn't catch the ball.
【解析】句意：他会接球。句子中could是情态动词，构成否定句时，在情态动词后面直接加not， 缩写成couldn't，所以答案是He couldn't catch the ball.
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题目内容
【题目】He could catch the ball. (改为否定句)
【答案】He couldn't catch the ball.
【解析】句意：他会接球。句子中could是情态动词，构成否定句时，在情态动词后面直接加not， 缩写成couldn't，所以答案是He couldn't catch the ball.