在英语语法中,名词性从句是指在主句中作为名词的从句。连接词是连接主句和从句的词汇,它们在句子中充当特定的成分。
名词性从句连接词的作用是将从句与主句连接起来,并在主句中充当名词的角色。它们可以作为主语、宾语、表语和同位语。
以下是一些常见的名词性从句连接词及其在句子中的作用:
- That(那个): That连接词通常用作主语或宾语,例如:
- That he is late again is really frustrating.(他再次迟到真的很令人沮丧。)
- I know that she is a doctor.(我知道她是医生。)
- Whether(是否): Whether连接词通常用于引导主语从句或宾语从句,例如:
- Whether she will come to the party is still unknown.(她是否会来参加派对还不确定。)
- I don't know whether he likes chocolate or not.(我不知道他是否喜欢巧克力。)
- Who(谁): Who连接词通常用作主语或宾语,例如:
- Who will be the next president is still up in the air.(谁将成为下一任总统还未确定。)
- I don't know who invited him to the party.(我不知道是谁邀请他来参加派对的。)
- Whom(谁): Whom连接词通常用作宾语,例如:
- The teacher asked whom we had invited to the party.(老师问我们邀请了谁来参加派对。)
- I don't know whom she is talking to on the phone.(我不知道她在电话里和谁说话。)
- What(什么): What连接词可以用作主语、宾语或表语,例如:
- What he said really surprised me.(他说的话真的让我很惊讶。)
- I don't know what to do next.(我不知道接下来该做什么。)
- The problem is what we need to solve.(问题是我们需要解决的。)
在名词性从句中,连接词的作用非常重要,它们将主句和从句紧密地联系在一起,使句子更加完整和有意义。