are的复数是什么,是they吗?

are的复数是什么,是they吗? man doctor 的复数是什么They are ( ).(man doctor) They have的复数形式是They am的复数形式是are吗 Is的复数形式是are吗? 英语复数提问句型,以及回答?_____ _____are there?这些是什么?（填空）我还有一些问题哈!What are these?可以这样问吗?如果可以,那答的时候可以说These are ``````吗?What are they?答的时候,是必须用they are it is的复数是they are 可以用在物上？我的意思是 they 可以指物？ they are 后面能加some It is a book.复数可以变they are some books 不是there are 是they are我知道there are 后面要加some我问的是they are后面要加some吗？ 英语复数变单数的句子They are English teachers. 什么是第三人称复数?什么是第三人称复数,例如这些 They are students；All the students are there.我一直搞不怎么清楚,什么时候该用复数,什么时候该用单数.到底谓语动词的单数和复数是与主语有关 something everthing 是单数还是复数?后面的be动词用is还是are?somewhere和everywhere也一样吗?somebody和everybody是单数还是复数?someone和everyone和somebody everybody一样吗用they还是it代替 偶是英语初学者.不懂!It is an old backpack 复数形式的是：These are old backpancks.还是They are old backpacks..还有,They 后边为什么是原型呢?那个They are old backpanck用不用加S? They are original中they are 的用法是什么 German的复数这个词有复数吗?是什么?是Germen吗？或者它到底有没有复数，存不存在复数？ Is that an orange的复数形式是什么?还有吧What are these?和 They are English buses改成单数句 John and Tom __my friends. __bikes__here A is ,His is B are, Their,are C are,They,is 请选择,答出的问题,需要说明理由,比如,选B , 为什么,是are,是复数吗?哪里看出来是复数?或者,你做题是怎么理解这道题的? How much are they?__________?回答 They are 60$.备选答案是How much are they?和How much is it 以前接触到的都是how much is it .不清楚 How much可不可以用复数询问.答案一定要正确,急用. they的复数形式