什么情况下要(不用)hashave比如一句话,hecallsateveryhouseinthestreet.hehascallsateveryhouseinthestreet.有没什么区别,第二种写法对不对原文是：hecallsateveryhouseinthestreetonceamonth

Question

什么情况下要(不用)has　have
比如一句话,he calls at every house in the street.
he has calls at every house in the street.
有没什么区别,第二种写法对不对
原文是：he calls at every house in the street once a month

Answer 1

第二种写法不对,正确的写法应该是 He has called at every house in the street.这是完成时,代表从过去到现在持续的动作,翻译过来是他从开始行动到现在已经访问了街上所有的住户.第一种写法是一般现在时,he calls at every house in the street once a month 的意思是他每个月访问街上所有的住户.