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1. I think she is there. 误：I think she isnt there. 正：I dont 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 didnt go to school too. 正：Tom didnt 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 hasnt had supper already. 正：He hasnt 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 hadnt a good rest just now. 正：He didnt 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。 | 
