得看句子中的主语、助动词以及时态,
比如:What does he do? He plays the piano.
What did he do?He played the piano.
What is he going to do ?He is going to play the piano.
Is he going to play the piano ?Yes, he is.
否定句一般综合以上情况,应该是原型.
得看句子中的主语、助动词以及时态,
比如:What does he do? He plays the piano.
What did he do?He played the piano.
What is he going to do ?He is going to play the piano.
Is he going to play the piano ?Yes, he is.
否定句一般综合以上情况,应该是原型.