系动词……
1）状态系动词
am is are were was
2）持续系动词
主要有 keep, rest, remain, stay, lie, stand
3）表像系动词
主要有seem, appear, look,
4）感官系动词
主要有feel, smell, sound, taste,
5）变化系动词
主要有become, grow, turn, fall, get, go, come, run.
6）终止系动词
主要有prove, turn out,