How a cool boy!这个句子哪里错了

How a cool boy!这个句子哪里错了 How cool the boy is! How love the boy is 这句话哪里错了, This is a alarm clock 这个句子哪里错了?.. spell a word jacket,please 这个句子哪里错了? How many knifas are there in the box?这个句子哪里错了 How long have you been staying here last night.这个句子哪里错了. How happy the boys are playing.这个句子哪里错了 there is a boy play basketball outside. 这个句子为什么错了? You is a school boy.哪里错了? He is a boy call David哪里错了 You are a good boy.Thanks you哪里错了