2015-08-24
xredued04
［误］ Someone called you right now.
［正］ Someone called you just now.
［析］ just now有两个意思，其一是"刚才"，其二是"现在"，而right now只能用于现在的状态。just则用于完成时态，如： I have just finished my homework.
［误］ My father will be back from America at present.
［正］ My father will be back from America presently.
［析］ presently有两个意思：其一是最近，不久，其二在美语中是现在之意，与at present相同。而for the present为暂时，如： I teach English in the school for the present.
［误］ I'll be back at the moment.
［正］ I'll be back in a moment.
［析］ at the moment 其意为"现在，当时"，而in a moment意为"马上过一会"，与in a minute意思相近。
［误］ The train from Shanghai will arrive here in time.
［正］ The train from Shanghai will arrive here on time.
［析］ on time为"准时"，而in time有两个含意。其一是"及时"，如：The doctor arrived in time。其二是"将来，终究"。
［误］ I met an old friend sometimes last month.
［正］ I met an old friend sometime last month.
［析］ Sometime 过去，或者将来某时。 Sometimes 有时
如： Sometimes I go to school by bus.Some time 一些时间
如： I need sometime to do my homework.Some times 几次
如： I went to Shanghai sometimes this month.
at times 有时，偶尔
at all times 经常
some other time 改天
［误］ I had met an old friend three days ago.
［正］ I had met an old friend three days before.
［正］ I met an old friend three days ago.
* ago 用在时间状语中时，主句中谓语动词一般用过去时，而before用于时间状语时则主句的谓语动词宜用完成时态。
［误］ He studied very hard. and at the end he passed the exam.
［正］ He studied very hard, and in the end he passed the exam.
［析］ in the end＝at last 意为"最终，终于"，表达经过若干努力而达到的结果。而at the end是在某事的结束时如何如何，如：At the end of class, the teacher gave us some story books。