連詞是一種虛詞,用于連接單詞、短語(yǔ)、從句或句子,在句子中不單獨(dú)用作句子成分。連詞按其性質(zhì)可分為并列連詞和從屬連詞。并列連詞用于連接并列的單詞、短語(yǔ)、從句或句子,如and, but, or, for等;從屬連詞主要引出名詞性從句(主語(yǔ)從句、賓語(yǔ)從句、表語(yǔ)從句等)和狀語(yǔ)從句(時(shí)間狀語(yǔ)從句、條件狀語(yǔ)從句、目的狀語(yǔ)從句等),引出名詞性從句的連詞如that, whether等,引出狀語(yǔ)從句的連詞如when, because, since, if 等。

but 與 however的用法區(qū)別

兩者均可表示轉(zhuǎn)折或?qū)Ρ?,意為“但是”、“可是”、“然而”等,但有區(qū)別:

1. 表示轉(zhuǎn)折時(shí),but 是連詞。如:

He is young but very experienced. 他雖年輕,但經(jīng)驗(yàn)很豐富。

He has three daughters but no sons. 他有3 個(gè)女兒,但沒(méi)有兒子。

He likes sports, but his wife likes music. 他喜歡運(yùn)動(dòng),而他妻子則喜歡音樂(lè)。

2. however 表示“然而”、“可是”時(shí),有的詞書(shū)認(rèn)為它是連詞,有的詞書(shū)認(rèn)為它是副詞。

之所以將其視為副詞,也許是因?yàn)橄裨S多副詞一樣不僅能位于句首,而且能位于句中(注意前后使用逗號(hào)),甚至句末(注意其前也用逗號(hào))。如:

Later, however, he changed his mind. 可是他后來(lái)改變了主意。

He hasn’t arrived. He may, however, come later. 他還沒(méi)有到,不過(guò)他等會(huì)兒可能會(huì)來(lái)。

He said that it was so; he was mistaken, however. 他說(shuō)情況如此,可是他錯(cuò)了。

注意:以上各例中的 however 不能換成 but,但可用 but 來(lái)改寫(xiě)。如:

He said that it was so, but he was mistaken. 他說(shuō)情況如此,可他錯(cuò)了。

3. 當(dāng)連接兩個(gè)句子時(shí),其前通常應(yīng)用分號(hào),或另起新句。如:

It’s raining hard; however, I think we should go out. / It’s raining hard. However, I think we should

?go out. 雨下得很大,但我想我們還得出去。

注意:上例中的 however 不能換成 but,但可用 but 來(lái)改寫(xiě) (注意所用標(biāo)點(diǎn)的變化)。如:

It’s raining hard, but I think we should go out.

怎么樣,看完了這篇文章,大家是不是對(duì)but和however的用法區(qū)別有了初步的了解了呢?喜歡就趕快收藏起來(lái)吧~