那是位男生的英文

he is a boy.

如果男孩在场，可以手指着男孩说 This is a boy.如果只是提及一个不在场的男孩，可以说 It is a boy. 或 That is a boy.this is、that is 和 it is 也可以用紧缩形式 this's、that's 和 it's 代替。

他是一个男孩 he is a boy; [例句]我有一个好朋友，他是一个男孩，他有一个非常好听的名字？罗伯特。I have a good friend, He is a boy, he has a very nice name? Robert.

That is a policeman

this is a boy

That is a polieman.

That's a policeman