什么是联系动词？Link verb（联系动词）即是连接表语和主语的词，其补充说明主语的作用。一般连接名词及词组，形容词，副词，不定式短语，过去分词现在分词及短语，一起补充说明主语的词。其本质上，是补语，组成系表结构（predicative structure）。
联系动词有以下类别：
be动词及其形式（静态动词表状态）：be，am，is，are，was，were，being，been，will/shall be，be going to，has been，had been；
I will be there.
I am hungery.
The apple is sweet.
The oranges in this village are very sweet.
He was energetic when he was a young boy.
The building is being black. （become）
The water has been stopped after the raining.
You shall/will be a student in senior school seven years later.
The tream is going to become stronger.
The battle has been finished after all the soldiers of both parties were died.
The classroom had been sweeped since the teacher came yesterday.
第二类：获得和成为（动态动词）：
1）get，getting， gotten；become，became.
I get it.
The crops is gotten in before the rain comes.
The athletes get 30 golden medals.
The watermelons in the land is getting mature.
The watermelons in the land become mature.
The little boy has become more handsome since he joined into the training team.
第三类：感观动词
feel，taste，seem，touch，smell，look，sound.
I feel ill.
The lettuce tastes fresh！
The weather seems cloudy.
The cotton is touched softly.
The chicken soup smells tasty.
You looks sad.
The news sounds encouraging.
第四类 延续性：
grow，appear，rest， stay，stand，lie，sleep，let，remain
I boy grows up.
The man appeared dealing with the difficulty.
The lost of dinosaur rests/remains a puzzle.
Let the dog stay in its nest.
The teacher lets the students stand up when they make mistakes.
The man lies down after shot by he billets.
The sleepy girl sleeps 24 hours in her dormitory.
Please remains the tasks done tomorrow.
以上为初步整理的联系动词，其用法在句子中去好好体会。
