英文as soon as與as long as用法(Usage of as soon as and as long as in English)

英文中，as soon as及as long as都是連接詞，前者表示｢一…就…｣，後者表示｢只要…｣。

as soon as用於連接幾乎同時發生的兩個動作，例如：As soon as I got home, Tom called me.(我一到家時，Tom打電話給我)，但主要子句為未來事實，從屬子句的時態需要用現在式，例如：As soon as he finishes the homework, he will play basketball with us.(一旦他做完功課後，他就會和我們一起打籃球)

as long as用以表示條件，相當於if(如果)的概念，例如：As long as you finish the homework, you can get a present.(只要你做完功課，你就可以得到一個禮物)，同樣地，主要子句為未來事實，從屬子句的時態需要用現在式。

as soon as及as long as放在句首時，須加上逗號區隔子句，至於句中，則不需要。例如：As soon as I got home, Tom called me.=Tom called me as soon as I got home. (我一到家時，Tom打電話給我)

參見(See also)
副詞子句(adverb clause)
as soon as與upon用法(Usage of as soon as and upon)

as soon as與as long as用法(Usage of as soon as and as long as)

not until用法(Usage of not until)

so that用法(Usage of so that)

as result of/result in用法(Usage of as result of/result)

because/because of用法(Usage of because/because of)