原因狀語從句
要點(diǎn):由連詞because,since,as引導(dǎo),也可由for,now that 等詞引導(dǎo)
1.I didn’t go to school yesterday because I was ill.
我昨天沒去上學(xué),因?yàn)槲疑×?
2.Since everybody is here,let’s begin our meeting.
既然大家都來了,讓我們開始開會(huì)吧.
3.As you are in poor health,you should not stay up late.
既然你身體不好,你就不該熬夜.
4.I asked her to stay to tea,for I had something to tell her.
我請(qǐng)她留下來喝茶,因?yàn)槲矣惺乱嬖V她.
.難點(diǎn)——because ,since ,as ,for,辨析
1） because語勢(shì)最強(qiáng),用來說明人所不知的原因,回答why提出的問題.當(dāng)原因是顯而易見的或已為人們所知,就用as或 since.
I didn’t go,because I was afraid.
Since /As the weather is so bad,we have to delay our journey.
2） 由because引導(dǎo)的從句如果放在句末,且前面有逗 號(hào),則可以用for來代替.但如果不是說明直接原因,而是多種情況加以推斷,就只能用for.
He is absent today,becaus e / for he is ill.
He must be ill,for he is absent today.