verb

is

是, 在

He is a doctor.

他是一名医生。

The book is on the table.

书在桌子上。

The weather is nice today.

今天天气很好。

He is running.

他在跑步。

((Subject)) is ((Noun Phrase)) (主语)是(名词短语) He is a doctor.

((Subject)) is ((Adjective)) (主语)是(形容词)的 The weather is nice today.

((Subject)) is ((Prepositional Phrase)) (主语)在(介词短语) The book is on the table.

((Subject)) is ((-ing verb)) (主语)正在(做…) He is running.

同义词:exists, lives;反义词:isn't

源自古英语“is”,来自原始印欧语系词根“*es-”,意为“是,存在”。是最基本的动词之一。

“is”将主语与其身份、位置或状态联系起来。可以把它想象成句子中的等号(=):He = a doctor。

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