中考英语考点分析 肯定句变否定句

　　误：I think she isn’t there.

　　正：I don’t think she is there.

　　析：英语中think, believe, expect, suppose等表示信念和揣测的动词，后接that从句时，习惯上将从句中的否定形式转移到主句上，即否定主句谓语，不否定从句谓语。

　　2. He can sing this song and that one.

　　误：He cannot sing this song and that one.

　　正；He cannot sing this song or that one.

　　析：肯定句中的连词and在否定句中一般要改为or。

　　3. Tom went to school too.

　　误：Tom didn’t go to school too.

　　正：Tom didn’t go to school either.

　　析：too和also用于肯定句中时，否定句中用either替换。

　　4. He has had supper already.

　　误：He hasn’t had supper already.

　　正：He hasn’t had supper yet.

　　析：随着对谓语动词的否定，某些副词也要作相应的变动。

　　5. He had a good rest just now.

　　误：He hadn’t a good rest just now.

　　正：He didn’t have a good rest just now.

　　析：have在表示开会、吃饭、休息、进行体育锻炼等词组中是行为动词，否定句用助动词来完成。

　　6. Let’s do it.

　　误：Let’s don’t do it.

　　正：Don’t let’s do it.或Let’s not do it.

　　析：let后接的是不带to的不定式，变为否定式，直接在句首前加Don’t或在不定式前加not。