英语中的频率副词,如always、usually、often和sometimes,通常后跟动词原形,例如"I always eat breakfast at 7 a.m."。然而,有些频率副词如seldom和rarely需要加上助动词do或does,构成否定句或疑问句。还有一些频率副词如hardly ever需要与否定句一起使用。因此,使用频率副词时,需要注意它们与动词的搭配方式。
一些常见的频率副词是always、usually、often和sometimes。它们一般都是放在句子的中间或者开头,后面跟着一个动词。而这个动词通常是动词的原形形式,例如:
- I always eat breakfast at 7 a.m.
- She usually takes a walk after dinner.
- He often plays basketball with his friends.
- Sometimes, I like to watch movies on weekends.
但是,也有一些频率副词不是后跟动词的原形形式。例如,seldom和rarely通常需要加上助动词do或does,构成否定句或疑问句。例如:
- She seldom does her homework on time.
- Does he rarely watch TV at night?
还有一些频率副词需要与其他词语搭配使用,例如hardly ever。这个频率副词的意思是“几乎从来不”,通常与否定句一起使用,例如:
- I hardly ever eat junk food.
- She hardly ever goes to the gym.