频率副词在英语中常用来表示动作或状态的频率,如always、usually、often、sometimes、rarely和never等。在一般现在时中,频率副词后面跟基本形式的动词;在现在进行时中,跟正在进行中的动词;在一般过去时中,跟过去式的动词;在现在完成时中,跟已完成的动词。使用频率副词时,需要注意其适用的时态,位置和语态等因素。
一般现在时
在一般现在时中,频率副词通常跟基本形式的动词。例如:
- I always eat breakfast before going to work.
- He rarely watches TV in the afternoon.
- They usually go to bed at 10pm.
现在进行时
在现在进行时中,频率副词通常跟正在进行中的动词。例如:
- I am always studying for my exams.
- He is rarely playing video games these days.
- They are usually working on their projects at this time.
一般过去时
在一般过去时中,频率副词通常跟过去式的动词。例如:
- I always ate breakfast before going to work when I was in college.
- He rarely watched TV in the afternoon last summer.
- They usually went to bed at 10pm when they were kids.
现在完成时
在现在完成时中,频率副词通常跟已完成的动词。例如:
- I have always loved playing basketball.
- He has rarely traveled to other countries.
- They have usually finished their homework by now.
需要注意的是,有些频率副词只能用于某些时态,这需要根据具体的语境来决定。同时,在使用频率副词的时候,也需要注意它们的位置和语态等因素。