be动词和do的区别是什么
来源:学生作业帮 编辑:神马作文网作业帮 分类:英语作业 时间:2024/11/18 11:17:51
be动词和do的区别是什么
比如说 Does 姚明 speak Chinese? 为什么不是 Is 姚明 speak Chinese?
还有 Are you in Grade 8? 为什么不是 Do you in Grade 8?
比如说 Does 姚明 speak Chinese? 为什么不是 Is 姚明 speak Chinese?
还有 Are you in Grade 8? 为什么不是 Do you in Grade 8?
do 为助动词,在英语句子中的作用是帮助句子构成疑问或否定,此时的句子中含有实意动词,如speak“说”.
而be 在性质上属于接系动词(The Linking Verb),后面要有名词、形容词、地方副词或短语作补足语(The Complement),其后不能出现实意动词原形,只能出现-ing分词表示正在进行或-ed分词表示被动.
再问: 那什么时候用DO 什么时候用be呢
再答: be是am/is/are 的原形,过去式为was/were,第一人称用am,第二人称或多个人称用are,第三人称单数用is。用法: 一、be属于接系动词(The Linking Verb), 后面要有名词、形容词、地方副词或短语作表语,构成系表结构做谓语。例如:
1. He is a teacher. 2. These pictures are beautiful. 3. I am here! 4. Mother is in the kitchen now.
若将这类句子变成疑问句,把“be” 动词提到句子前面即可:
1. Is he a teacher? 2. Are these pictures beautiful? 3. Is mother in the kitchen now?
当然要注意“be”动词在祈使句中出现时,它必须借助助动词“do”或“don't”,如:
1. Don't be a fool!
二、“be”还可以作助动词
1).“Be + 现在分词”以组成进行式时,如:
1. Tom is watering the garden. 2. The children are playing in the field. 3. I was watching TV when he came back.
2).“Be + 过去分词”构成被动语态(The Passive Voice),如:
1. He was told about the exchange student programme by his Chinese instructor when he was a university student. do是do/does 的原形,第一二人称及多人称用do,第三人称用does。用法:一、作为助动词是没有词义的,在句中的构成疑问句和否定句。1) 构成一般疑问句,例如: 1.Do you want to go shopping with me? 2.Did you learn English? 2) + not 构成否定句,例如: 1. I do not want to go shopping。2. He doesn't like to learn English. 3) 构成否定祈使句,例如: Don't go there. 4) 放在行为动词前表示强,例如:I do believe I can do the job well.二、也可作为行为动词,意思是“做”。例如:I can do the job well. 2. You should do your homework now.再简单点,be的后面不能再出现行为动词的原形、第三人称单数、过去式形式,因为这几类可以充当谓语动词,和be是冲突的。而do的后面就是动词原形了,它构成句子的否定或疑问、强调。
而be 在性质上属于接系动词(The Linking Verb),后面要有名词、形容词、地方副词或短语作补足语(The Complement),其后不能出现实意动词原形,只能出现-ing分词表示正在进行或-ed分词表示被动.
再问: 那什么时候用DO 什么时候用be呢
再答: be是am/is/are 的原形,过去式为was/were,第一人称用am,第二人称或多个人称用are,第三人称单数用is。用法: 一、be属于接系动词(The Linking Verb), 后面要有名词、形容词、地方副词或短语作表语,构成系表结构做谓语。例如:
1. He is a teacher. 2. These pictures are beautiful. 3. I am here! 4. Mother is in the kitchen now.
若将这类句子变成疑问句,把“be” 动词提到句子前面即可:
1. Is he a teacher? 2. Are these pictures beautiful? 3. Is mother in the kitchen now?
当然要注意“be”动词在祈使句中出现时,它必须借助助动词“do”或“don't”,如:
1. Don't be a fool!
二、“be”还可以作助动词
1).“Be + 现在分词”以组成进行式时,如:
1. Tom is watering the garden. 2. The children are playing in the field. 3. I was watching TV when he came back.
2).“Be + 过去分词”构成被动语态(The Passive Voice),如:
1. He was told about the exchange student programme by his Chinese instructor when he was a university student. do是do/does 的原形,第一二人称及多人称用do,第三人称用does。用法:一、作为助动词是没有词义的,在句中的构成疑问句和否定句。1) 构成一般疑问句,例如: 1.Do you want to go shopping with me? 2.Did you learn English? 2) + not 构成否定句,例如: 1. I do not want to go shopping。2. He doesn't like to learn English. 3) 构成否定祈使句,例如: Don't go there. 4) 放在行为动词前表示强,例如:I do believe I can do the job well.二、也可作为行为动词,意思是“做”。例如:I can do the job well. 2. You should do your homework now.再简单点,be的后面不能再出现行为动词的原形、第三人称单数、过去式形式,因为这几类可以充当谓语动词,和be是冲突的。而do的后面就是动词原形了,它构成句子的否定或疑问、强调。