because引導原因狀語從句,本身是個連詞,連接兩個完整的句子,because後面是原因。(要注意,because引導的從句只能做狀語,不能做其他成分 eg:It is because... 就錯了)同時,相較於as、since(同爲連詞表原因時),because的語氣更強,也更正式;而for本是不是連詞,不能連接兩個句子,後面只能接短語。
eg:I was tired today because I stayed up late last night.
because和because of的意思都是:因爲,由於。
但是在用法上又有不同。
because:後加從句。
比如:She doesn't go to school because she is ill.
她沒來上學因爲她生病了。
在這句話中。
she is ill就是從句。所以because後面就是接從句。
而再來看because of。
because of:後加代詞/名詞/動詞的`ing形式。
還是拿剛纔那句話來比較。用because of來代替後。就是:
She doesn't go to school because of her illness.
同樣的一個意思。接連的卻不同。
her illness是名詞。
這就可以說明。because of後接代詞/名詞/動詞的ing形式。