since+doing
答：since与when的区别为：意思不同、用法不同、侧重点不同。一、意思不同 1、since：自…以后，从…以来。2、when：什么时候，何时，什么情况下。二、用法不同 1、since：since用作介词的意思是“从…以来，自从…之后”，其宾语常指过去的一个时间点，其含意通常指持续到说话时刻的动作或情况开始于...
答：For suggests that the reason is given as an afterthought. It is never placed at the beginning of the sentence and is more characteristic of written, rather than spoken English:e.g. I decided to stop the work I was doing - for it was very late and I wanted to go to bed.
答：since引导的时间状语从句表达自从...以来，主句通常我们现在完成时或者过去完成时，而从句则用一般过去时
答：第一句话翻译：我六岁的时候就开始骑车了 第二局话翻译：我从幼儿园第一天开始就和艾米是朋友了.have been……since……讲解 1、翻译：已经……自从……，表示从过去到现在一只持续某状态 2、用法：been+n/doing+since+过去时 过去时需是一个时间点，不能是一个表示一段时间的名词！
答：1、如果从句与主句的行为将接踵发生,那么从句要用一般现在时,如：He will come in if you do your homework.如果你要做作业,他们就会进来.2、如果主句的行为将发生在从句行为的过程中,那么从句要用现在进行时,如：He will not come in if you are doing your homework.如果你做着作业的话,他就...
答：I now in good condition, graduated from the teachers have been doing the work, I work in XXXXXXX. Please rest assured. I really appreciate your help.Since this job, I found my deep love this job because I can teach more knowledge, to teach them how to love others. I hope ...
答："Since then, he has developed another bad habit.""自那以后,它养成了另一种环习惯.""Since then, they have been trying to find out how the fire began.""自那时以来,他们一直在设法查明起火的原因."词性变化 conj.自…以后； 自…以来 What have you been doing since I last saw you...
答：选B。搭配1. since+过去的一个时间点（1995...），如: I have been here since 2008.搭配2. since+一段时间+age,如: I have been here since two years ago.搭配3.since+从句 如: Great changes have taken place since you have left.
网友评论：
查畏13267389871：
since后一般加现在完成时,那加doing进行时态可以吗?例句说明 -
69602佟绿
：[答案] 现在完成时+since+一般过去时,如:I have worked here since i came here. 现在完成进行时+since+一般过去时,如:I have been working here for 10 years since i came here.这里强调动作仍然在继续.
查畏13267389871：
since有没有以下的用法?since +one's+doing有的话能不能举个例子, -
69602佟绿
：[答案] 这是我学过的since的用法: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).例如: I have been here since 1989. 1989起,我一直在这儿. 2) since +一段时间+ ago.例如...
查畏13267389871：
有since doing sth.用法吗 -
69602佟绿
：[答案] 没有这种用法. since+从句,主句.表已知必然理由,原因状语从句 since you have been here,you may stay here as well. 主句.(完成时态)since+从句(过去式).时间状语从句 it has been 3 years since I left home.
查畏13267389871：
英语.所有时态的句式. -
69602佟绿
：[答案] 时态 - 一、 一般现在时 1.概念:经常、反复发生的动作或行为及现在的某种状况. 2.时间状语: always, usually, often, ... 这一动作可能刚刚开始,也可能仍在继续,并可能延续到将来. 2.基本结构:have/has +been+doing 3.时间状语:since+时间点,...
查畏13267389871：
英语常见的时间状语是什么? -
69602佟绿
：[答案] for+时间段 ,since+时间点 ,by+将来的时间 ,lately;recently,just,up to now,till now,so far,these days,in the past few years/months/weeks/days ,yesterday;last week;in 1945,at that time;once;during the war;before;a few days ago;when,used to+动词原形...
查畏13267389871：
I have been back twice ()moving to China 这里为什么不能填after,填since表什么词性 -
69602佟绿
： since与after 都可以用来引导表示从过去某一点开始的时间段词组.它们的不同之处在于:a)since引导的词组所表示的时间一直延续到说话时为止,因而要与现在完成时连用.例如:He has been there twice since 1982.I have done nothing since ...
查畏13267389871：
for,since在完成时的区别? see sb doing sth以及see sb do sht -
69602佟绿
： since+点时间 for+段时间 doing指看到某人正在做某事 do指看到某人经常做某事
查畏13267389871：
谁能帮我总结一下初中三年所学的英语各种的时态的结构形式 -
69602佟绿
：[答案] 一、 一般现在时 1.概念:经常、反复发生的动作或行为及现在的某种状况. 2.时间状语: Always, usually, often, sometimes, ... 并可能延续到将来. 2.基本结构:主语+have/has +been +doing+其他 3.时间状语:since+时间点,for+时间段等. 4.例子:I ...
查畏13267389871：
since 能加doing(v.ing )吗?有做过这样的题 -
69602佟绿
： Soldiers, mainly protecting government buildings and important institutions, remained passive as they have since replacing police on the streets almost a week ago= Soldiers, mainly protecting government buildings and important institutions, ...
查畏13267389871：
时间状语从句 -
69602佟绿
： 用来修饰谓语动词、其它动词、定语、状语或整个句子的从句叫做状语从句.时间状语从句 §时间状语从句(adverbial clause of time) 1.由when, while, as引导的时间状语从句.例如: When you think you know nothing, then you begin to know ...
