主语+连系动词+表语
例句：These flowers are very beautiful.这些花非常漂亮。
连系动词look feel smell sound taste
主语+系动词+形容词
副词修饰一般动词、形容词和副词，形容词修饰名词，或用在be动词、连系动词之后。
①His English is very good.他的英语很好。
副词very作形容词good的修饰语。
⑧He runs quite fast.他跑得很快。
副词quite作副词fast的修饰语。
③The sun rises in the morning.太阳在早上升起。
介系词片语in the morning作动词rises的修饰语。
④I am glad to meet you.我很高兴见到你。
不定词片语to meet you是形容词glad的修饰语。
⑤I haven'；t heard from him since he went to Taiwan.从他去台湾后我便没有收到他的来信。
副词子句since he went to Taiwan是动词片语haven'；t heard from him的修饰语
