在英语中,名词性从句的引导词选择对于构建正确的从句至关重要,主要有连词、关系代词和关系副词三类。连词如'that'和'whether/if'用于连接主句和从句。关系代词如'who/whom'、'which'和'that'用于代替先行词并连接主句和从句。关系副词如'where'、'when'和'why'则代替先行词所在的整个从句中的词或短语。正确的引导词选择可以提高英语表达能力。
连词
连词在名词性从句中的作用是连接主句和从句。常见的连词包括that
和whether/if
。that
通常用于宾语从句和表语从句中,而whether/if
则用于主语从句和宾语从句中。例如:
- I know {that} you are busy.
- {Whether/If} you come or not, I will still go.
关系代词
关系代词在名词性从句中的作用是代替先行词,并连接主句和从句。常见的关系代词包括who/whom
、which
和that
。who/whom
通常用于指人的先行词,which
用于指物的先行词,而that
则可用于指人或物。例如:
- The man {who/whom} I met yesterday is a doctor.
- The book {which} I bought yesterday is very interesting.
- The house {that} I live in is very old.
关系副词
关系副词在名词性从句中的作用也是代替先行词,并连接主句和从句。不同于关系代词,关系副词并不代替先行词的名词或代词,而是代替先行词所在的整个从句中的词或短语。常见的关系副词包括where
、when
和why
。例如:
- This is the place {where} I was born.
- I remember the day {when} we first met.
- Can you tell me the reason {why} you are late?