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一般过去时中肯定句变否定句的方法： ⑴当句中含有情态动词could/would/should等时，可直接在后面加上not，构成否定句。(注意:could就是can的一般过去时) 例如：肯定——I could get you a concert ticket .我能给你一张音乐会的票。 否定—— I could not/couldn't get you a concert ticket . ⑵含有be动词was/were的一般过去时：在be动词后面直接加not。 例如：I was late yesterday.-I wasn't late yesterday.我昨天没有迟到。 ⑶当句中谓语动词是除了情态动词、助动词、be动词以外的实义动词，在该动词原形前加上did not，构成否定式。 例如：肯——Jenny bought a T-shirt yesterday. 否——Jenny didn't buy a T-shirt yesterday.Jenny昨天没有买一件体恤衫。 (责任编辑：admin) |