反义疑问句It looks like rain, doesnt it?He doesnt need to work so late, does he?This is a dictionary, isnt it?Those are shelves, arent they?There once was a man named Saint Nicholas, wasnt there?I am very interested in learning English, arent I?4）陈述句的主语是动词不定式，动词的-ing形式或从句时，疑问部分的主语多用it来体现。如：Taking care of our environment is very important, isnt it?What he said is right, isnt it?5）陈述句中含有not, no, hardly, neither, never, few, little, too to等否定词或具有否定意义
