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	1.        be动词的变化。
	否定句:主语be not 其它。如:
	He is not a worker.他不是工人。
	一般疑问句:Be 主语其它。如:
	-Are you a student?
	-Yes. I am. / No, I'm not. 
		
		非凡疑问句:疑问词一般疑问句。如:
	
	
		Where is my bike?
	
	
		2.行为动词的变化。
	
	
		否定句:主语don't( doesn't ) 动词原形( 其它)。如:
	
	
		I don't like bread. 
	
	
		当主语为第三人称单数时,要用doesn't构成否定句。如:
	
	
		He doesn't often play. 
	
	
		一般疑问句:Do( Does ) 主语 动词原形 其它。如:
	
	
		- Do you often play football?
	
	
		- Yes, I do. / No, I don't. 
	
	
		当主语为第三人称单数时,要用does构成一般疑问句。如:
	
	
		 - Does she go to work by bike?
	
	
		- Yes, she does. / No, she doesn't.
	
	
		2.行为动词的变化。
	
	
		否定句:主语 don't( doesn't )  动词原形( 其它)。如:
	
	
		I don't like bread. 
	
	
		当主语为第三人称单数时,要用doesn't构成否定句。如:
	
	
		 He doesn't often play. 
	
	
		一般疑问句:Do( Does )  主语 动词原形
	
	
		其它。如:
	
	
		- Do you often play football?
	
	
		- Yes, I do. / No, I don't. 
	
	
		当主语为第三人称单数时,要用does构成一般疑问句。如:
	
	
		- Does she go to work by bike?
	
	
		- Yes, she does. / No, she doesn't.
	
	
		动词s的变化规则
	
	
		1.一般情况下,直接加-s,如:
	
	
		cook-cooks, milk-milks 
	
	
		2.以s. x. sh. ch. o结尾,加-es,如:
	
	
		guess-guesses, wash-washes, watch-watches, go-goes
	
	
		3.以“辅音字母y”结尾,变y为i, 再加-es,如:
	
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