Question

john is 后面有什么单词

Answer 1

后面的单词如下：
1、名词，如：John is a boy.
2、形容词，如：John is taller in his class.
3、还有动词、介词，副词。这还不包括否定词。所以，此题无固定解，关键看想表达的主要意思。
John is going to the school.

Answer 2

john is my friend.
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Answer 3

后面可以加形容词。
John is handsome. John很帅。
John is quiet. John很安静。
也可以加动词变成现在进行时。
John is swimming. John在游泳。