请问 You must keep the room warm.keep 是实意动词还是系动词?如何判断?

请问 You must keep the room warm.keep 是实意动词还是系动词?如何判断? 情态动词的祈使句把You must keep quiet in the reading room.You cannot 如何判断dare是情态动词还是实意动词 请分析一下这句英语的成分：You must keep the room warm. 怎样判断是情态动词还是实意动词啊? our room must be kept clean.中的keep不是系动词么,怎么用被动态 keep是系动词吗? 请问如何区分need是情态动词还是实意动词呢?请简明扼要的回答, You must keep s_____ in the reading room keep系动词造句 keep the door open 中的keep是不是系动词 keep是和动词原形还是动词ing形式连用