These days,many families keep pet dogs为什么keep不加s 呢

These days,many families keep pet dogs为什么keep不加s 呢
还有,我不懂什么时候,什么句式和形态后动词加s 或者不加s

起猎早 1年前已收到3个回答举报

avenger47 幼苗

共回答了17个问题采纳率：88.2% 举报

哎呀,看来基本的语法都不过关.我来告诉你吧.当主语是第三人称he,she,it或单数时,谓语动词要加s.当主语是复数的时候,谓语动词不能加s.就像你提到这句.主语是复数.至于句式,则没有分句式来加s或者不加s,都是要主语,不看句式.

1年前

鱼呀雨呀鱼幼苗

共回答了1个问题举报

为什么PET不用加S呢？近段时间最流行的宠物是“大肚猪”。表示宠物的类别，总称，所以不加s 因为这里的pet代表的是一个种类（宠物群）的

1年前

wcggl 幼苗

共回答了2个问题举报

因为families是复数，是许多家庭而不是一个，不是第三人称单数，所以谓语动词没有用单数也就是你说的没有加s，一般现在时的第三人称单数才会在谓语动词那用单数，但是情态动词can ,must之类的是不用的，这个可以看看语法书，这样也很难这么点字就说的清...

1年前

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