在英语语法中，主语通常紧跟在关联词后面，但是在某些情况下，主语也可以放在关联词之前。
主语放在关联词后面
当关联词为“that”、“whether”、“if”、“who”、“whom”、“whose”、“which”或“whose”时，主语通常放在关联词后面。例如：
- I believe that education is important.
- Do you know whether he will come?
- I don't know if it will rain tomorrow.
- The woman who lives next door is a doctor.
- The boy whom I met yesterday is my classmate.
- The book whose cover is red is mine.
- The car which I rented is very expensive.
主语放在关联词前面
当关联词为“as”、“than”、“like”、“except”、“such as”、“rather than”或“but”时，主语通常放在关联词之前。例如：
- As a teacher, I think education is important.
- He is taller than his brother.
- I dance like a professional.
- Everyone came except John.
- I like fruits such as apples and bananas.
- I prefer tea rather than coffee.
- The weather is cold, but I still go out.
需要注意的是，有时候主语会放在句子的开头或结尾，这通常是为了强调主语。例如：
- John, he is the one who won the prize.
- The prize was won by John.
以上就是主语放在关联词前后的规律。掌握这些规律，可以帮助我们更好地理解英语语法，提升我们的英语水平。
