Web1、since 后面跟时间点或从句,若后面接从句,则一般用一般过去时,例如: a、自从你上次打电话以来,他一直不在办公室。 正确:Hehas beenout of the office since you last phoned. 错误:Heisout of the office since you last phoned. b、正如你所回忆起来的,巴黎办事处从这个项目开始就一直在协助我们。 正确:As you may recall, the Paris … Web23 okt. 2014 · 在练习卷上有道题目是It is 10 years since he left the army.然后书本上有句话是It has been 10 years s…
关于since的从句用法_百度知道
Web9 dec. 2016 · 1) since +过去一个时间点 (如具体的年、月、日期、钟点、1980, last month, half past six)。 I have been here since 1989. 1989起,我一直在这儿。 2) since +一段时 … Web五、可以用来引导一个否定的宾语从句,whether则不能用来引导否定的宾语从句,因为它表示正反两方面的选择意义比较强. Tell me if it is not going to rain,please. 六、if除引导宾语从句外,还可以引导条件状语从句,作“是否”解.在容易引起混淆产生歧义的情况下,就不可用 ... leart bilalli
if和whether的区别 - 知乎
Web介词to用法: 1.表示方向或目的:I'm going to the store.(我要去商店。 2.表示与某人联系:I talked to him yesterday.(昨天我和他交谈了。 ) 3.表示受益者:I gave the book to my friend.(我把书给了我的朋友。 ) 介词for用法: 1.表示目的:I bought this gift for my mom.(我为我妈妈买了这个礼物。 ) 2.表示时间:I'll be on vacation for two weeks.( … Websince之后常接名词、动名词作其宾语, since then意为“从那以后”。 since用作副词表示“以前”时还可和long, ever连用。long since意为“好久以前”, not long since意为“就在不久前”, … Websince的用法:译作“自从…以来” (1)接时间点:如 I have stayed in that country since 1995.要求:谓v.用现在完成时,而且须是延续性动词. (2)接一段时间 + ago:如 They have lived in that house since two years ago.要求:谓v.用现在完成时,而且须是延续性动词. (3)接时间状语从句:如 I have loved her since I met her last time./ Lily has stayed at home … how to do present progressive in spanish