I haven't heard from him since he went to America.是复合句还是简单句
句中有现在完成时,表示从过去某个时间直延续到现在。
when只有一个时刻,相当于at that time.
since是从那时开始,因此选D。
until
till和until一般情况下两者可以互换,但是在强调句型中多用until。并且要注意的是:如果主句中的谓语动词是瞬时动词时,必须用否定形式;如果主句中的谓语动词是延续性动词时,用肯定或否定形式都可以,但表达的意思不同。例如:
I didn't go to bed until(till) my father came back.直到我父亲回来我才上床睡觉。
It was not until the meeting was over that he began to teach me English.直到散会之后他才开始教我英语。
I worked until he came back.我工作到他回来为止。
I didn't work until he came back.他回来我这才开始工作。
Please wait until I arrived.在我到达之前请等我。
since
ad.(常用于现在完成时或过去完成时)
1. 此后;从那时到现在
She left school three years ago and has worked as a nurse ever
since.
她三年前毕业,从那时起便一直当护士。
2. 之前,以前
prep.
1. (常用于现在完成时或过去完成时)自...以来,从...至今
I haven't heard from him since last year.
我自去年以来未曾收到过他的信。
conj.
1. (常用于现在完成时或过去完成时)自...以来,从...至今
It's been ten years since they married.
他们结婚到现在已经十年了。
She has been living a hard life since her husband died.
她自从丈夫死后,一直过着艰苦的生活。
2. 既然;因为,由于
He must have taken the book since it isn't here.
他一定是把书拿走了,因为书已不在这里了。
Since it is so hot, let's go swimming.
既然天气这么热,我们去游泳吧。
I haven't heard from him since he went to America.是复合句。since引导的是时间状语从句。
原句意思是从他去了美国,我就没有他的消息了。
1、简单句的概念和句型
简单句就是只包含一个主谓结构的句子。简单句中句子各成分都是只由单词或短语构成的。
在简单句中主谓结构是句子的主干,是句子的核心。
简单句可归纳为五个基本句型。表达简单句使用哪个基本句型,取决于该句子中的谓语动词。
例句:
The sun rises.(主语+不及物动词)
太阳升起来。
I don't like basketball.(主语+及物动词+宾语)
我不喜欢篮球。
Danny is tired.(主语+系动词+表语)
丹妮累了。
I read her a story.(主语+动词+间接宾语+直接宾语)
我给她读了故事。
I helped her brush her teeth.(主语+动词+宾语+宾补)
我帮她刷牙。
2、复合句概念和句型
复合句分为并列复合句compound sentence(也称并列句)和主从或从属复合句complex sentence(也称复杂句)。
(1)并列复合句compound sentence是有并列连词:and、or、but连接;
例句:
I like singing , but she likes dancing
我爱唱歌,但是她爱跳舞。
Give me your wallet or I will kill you.
把你的钱包给我,不然我会杀了你。
(2)从属复合句complex sentence由一个主句(Principal Clause)和一个或一个以上的从句(Subordinate Clause)构成。用疑问词作引导词,主句是全句的主体,通常可以独立存在;从句则是一个句子成分,不能独立存在。从句不能单独成句,但它也有主语部分和谓语部分,就像一个句子一样。所不同在于,从句须由一个关联词(conjunction)引导。 根据引导从句功能不同,大致可分为:主语从句、表语从句、宾语从句、定语从句、状语从句等。
例句:
He is the man who I saw in the park yesterday.
他是昨天我在公园见到的那个人。
Where I live there are plenty of trees.
我居住的地方有很多树。
Always do to the others as you would be done by.
你希望人家怎样待你,你就要怎样待人。
复合句.简单句只有一套主语+谓语.since引导了一个从句
唱咳帅孚:[选项] A. since B. for C. ago D. before
木兰县15190976024: I haven't heard from him last week. - ?
唱咳帅孚: A since的用法主要有两点:一是表示“自从……以来”,二是表示“既然”之意.但如果只了解词的含义,而不了解其用法,在使用时就会造成错误.例如:I have not heard from him since I lived in Shanghai. 不少人会望文生义,将该句译为:...
木兰县15190976024: 英语时态问题 加not 还是don't - ?
唱咳帅孚: don't. do, be, have 这三个词词性是类似的,都是表示时态用的.只有这样的词后面才能跟not.还有情态动词,如must,can,may,should等,表否定时也是后跟not. 一般的行为动词,在一般现在时中,是前面省去了do,比如说,he jumps,完全...
木兰县15190976024: I hope I haven't failed.为什么两个动词连用 - ?
唱咳帅孚: 完成时态的固定用法,have或者其变形+动词过去分词
木兰县15190976024: 假如你是在南京学习的英国交流学生Max,你的英国同学Simon 给你写了一封电子邮件.请你根据邮件内容,用英语给Simon 回一封电子邮件.Hey Max,I haven't... - ?
唱咳帅孚:[答案] One possible version:Hi Simon, Sorry I haven't written till now.I'm really busy with the courses and making new friends these days.(高分句型)I think people here are kind and frie...
木兰县15190976024: must的反义疑问句 - ?
唱咳帅孚: 你好.must在这里是表猜测的,解释为“肯定,想必一定”.教你一个简单的方法: 将must变成I am sure + 去掉must的句子,谓语动词随“当时”,看例句吧,这样更容易理解: 1 You must have made the mistake,haven't you ? == I am sure you ...
木兰县15190976024: No,Ihaven'tbeen{to}Beiingyet? ?
唱咳帅孚: 首先 TO是介词 而THERE属于副词 在你的这个问题中属于代词 这里I haven't been to Beijing yet是一种固定搭配 have been to XXX是过去完成时 曾经到过某处并且现在已经离开不再在那里了 而你问的如果用there代替是一种代词性质 代替某一个地名翻译成“那里”(某个地方) 把Beijing去掉 把to换成there 则I haven't been there yet 意思是我还没有去过那里 如果there 和 Beijing同时出现在句中那就不通顺 重复了
木兰县15190976024: You haven't read the notice to the students,and - __.A.either have I. B neither have I C neither I have D so have I 顺便问一下这些选项的意思 - ?
唱咳帅孚:[答案] B so+主语+谓语 :……的确如此 so+谓语+主语:……也是如此;否定:neither+谓语+主语:……也没有 have I either两者中的一方,常用的有either……or……或者,或者;否定:neither……nor……既不……也不 句意:你没有把通知读给学生听,...
木兰县15190976024: 英语改错题 三道?
唱咳帅孚: 1.I haven't heard from my pen friend for a long time.I am going to write him a letter this evening.----- I haven't heard from my penfriend for a long time. I am going to write to him this evening. 2.Since I came here last year.I have visited a lot of ...
木兰县15190976024: ...the cheapest one for me.I put it on.It didn't fit, 43 it was new and I was anxious to have it,so I said:“Could you wait a few days for the money?I ... - ?
唱咳帅孚:[答案] 36.D 37.A 38.C 39.D 40.A 41.B 43.C 44.C 45.A46.C 47.B 48.D 49.C...