及物动词就是后面可以直接跟宾语的,不及物就是需要加介词再加宾语的.系动词就be动词及感官动词,that在定语从句中指人时相当于who或者whom ,指物时相当于which,限制性定语从句只能用that 的几种情况
1．当先行词是anything, everything, nothing (something 除外), few, all, none, little,
some 等代词时,或者是由every, any, all, some, no, little, few, much 等修饰时
2. 当先行词被序数词修饰
3. 当先行词被形容词最高级修饰时
(1) This is the best film that I have seen.
4. 当形容词被the very, the only修饰时
(1) This is the very dictionary that I want to buy,
(2) After the fire in his house, the old car is the only thing that he owned.
当先行词指人时,偶尔也可以用who
(3) Wang Hua is the only person in our school who will attend the meeting/
5. 当先行词前面有who, which等疑问代词时
(1) Who is the man that is standing there?
(2) Which is the T-shirt that fits me most?
6. 当先行词既有人,也有动物或者物体时