prep. (表示对象、用途等)给,对,供; 以帮助; 为了; 关于
conj. 因为; 由于
Oxford 3000 / Collins.5 / BNC.12 / COCA.13
prep.
conj.
In addition to the uses shown below, for is used after some verbs, nouns, and adjectives in order to introduce extra information, and in phrasal verbs such as ‘account for’ and ‘make up for’. It is also used with some verbs that have two objects in order to introduce the second object.
除下列用法外,for 还可以用在一些动词、名词和形容词后,以引出更多信息,还可以用于 account for,make up for 等短语动词中。for 还可以和一些有双宾语的动词连用,引出第二个宾语。
You use for to say how long a period lasts in the past, present, or future, or how much time passes without something happening. She slept for eight hours… He will be away for three weeks… I hadn't seen him for four years. You use since to say when a period of time started. She has been with the group since it began. …the first civilian president since the coup 17 years ago. You also use since to refer to the last time that something happened, or to how much time passes without something happening. She hadn'teaten since breakfast… It was a long time since she had been to church.
for 用于表示在过去、现在或将来持续的一段时间,或某事发生之前的时间长短。例如:She slept for eight hours (她睡了8个小时),He will be away for three weeks (他要离开3周),I hadn't seen him for four years (我已经4年没见过他了)。since 用于表示一段时间的开始,例如:She has been with the group since it began (这个集团创建之初她就在那里工作),the first civilian president since the coup 17 years ago (自17年前的政变以来的首位平民总统)。since 也可用于指某事最后一次发生的时间或某事发生之前的时间长短,例如:She hadn't eaten since breakfast (她早饭后就没吃过东西),It was a long time since she had been to church (她很长时间没去教堂了)。
in BRIT, use 英国英语用after
Both for and to can be used to talk about somebody's purpose, but in different structures. For must be followed by a noun when expressing purpose. Occasionally I go to the pub for a drink.For is not normally used before a verb. You cannot say 'I go to the pub for to have a drink'. You can use for before an -ing form to describe the purpose of an object. …a small machine for weighing the post. With verbs, the infinitive is used without 'for'. She then went off to fetch help.
for 和 to 都可以用于谈论某人的目的,但是所用结构不同。表示目的时,for 后面必须接名词,例如:Occasionally I go to the pub for a drink (我偶尔会到酒吧里喝一杯)。for 一般不用在动词前。不能说I go to the pub for to have a drink。可以在-ing形式前用for来描述某物的用途,例如:a small machine for weighing the post (给邮件称重的小机器)。for 不与动词不定式连用, 如: She then went off to fetch help (她接着出去找人帮忙)。
because as for since【导航词义:因为,由于】
because conj. 因为
〔辨析〕语气最强,表示因果关系,通常用来回答由 why 引导的疑问句。由 because 引导的分句置于句首时,须用逗号与主句隔开,置于句末时则不用隔开。
as conj. 因为,由于
〔辨析〕如果所述理由是明显的或者已知的,则用 as 较 because 更为合适。
for conj. 〈正式〉因为
〔辨析〕for 属于并列连词,由它引导的分句表示补充说明性的理由,通常只能置于句末,且必须用逗号与前面的分句隔开。
since conj. 因为,既然
〔辨析〕当所述原因是已知的客观事实或被当作推断的理由时用 since,语气略强于 as。
prep.
be in for it
for all
there's/that's… for you