怎样把肯定句变成否定句和疑问句
怎样把肯定句变成否定句和疑问句
一、动词有四种:行为动词、连系动词、助动词和情态动词。
二、变句分四种情况:
当谓语为以下动词时 变否定句 变疑问句 备注
1. 连系动词be时 be后面加not be提前大写 be包括am is are was were 2. 情态动词can may 上述情态动词 上述情态动词 类似词还有will shall; 情动无 must would should时 后面加not 提前大写 人称数的变化;情动need参下 3. 助动词 助动词后加not 助动词提前大写 帮助其它动词构成时态
或语态的动词如be have
4.行为动词时 主语非三单时行动前加don’t 主语非三单时句首加do some改为any但在希 系动...起来、成为… 主语为三单时行动前加doesn’t 主语为三单时句首加does 望对方肯定回答的问句
中不变
注意:第三人称单数包括he、she、it和单个的人名、地名、事物名;need在“need + v”结构中为情动,在“need to do”和“need + n”结构中为行为动词,用法参考2、4条; 另外变疑问句时,第一人称要对调成第二人称;would表示委婉的请求和邀请,译为“请”, should用于提出建议、劝告,表示“应该” ; 主语为三单时行为动词前加doesn’t 变否定或句首加does变疑问后,原行为动词要还原成原形。
练习一: 填词把肯定句变为否定句和疑问句。
肯定句 否定句 疑问句
The teachers are nice. The teachers a nice teacher. I am an excellent student. He can speak English. speak English. he speak English? I would like a cup of coffee. You should do something. do anything. do anything? a break ... ? I like history best. I like history at all. like history? 以下是助动词的例子
playing basketball. He is fixing a machine. fixing a machine? I have got a compute. got a compute. You have got a brother. got a brother. She has got two friends. got two friends. 练习二: 把整个肯定句子变为否定句和疑问句。
I am a teacher of middle school. The car can take them to the park. The watch works very well. She is flying a kite. They are very big horses.
You should go home.