1.如图，已知△ABC中，AB=AC，AD是BC边上的高，E为BD上一点，GE⊥BC，且交AB于F，交CA延长线于G，求证:GE+EF=2AD.2.词性转换：Thereexist clear ___ (culture) differences between the two countries.More and more ___ (history) relics have been unearthed in recent years.Due to the...
they .例如：This is your book， isn't it？Seeing is believing， isn't it？Whether he will come to the party or not is up to him， isn't it？These are not yellow， are they？另：反意疑问句的18种特殊句式：http://sl.iciba.com/html/2006/0315/19/28038_1.htm ...
英语否定句：凡句中有动词be(am/is /are/was/were) ，情态动词(can/could/may/must/will/would/shall/should/...)，助动词(have/has /had 完成时）的，变否定句时直接在这些词的后面加not，否则要加上相应的助动词don't / doesn't (一般般现在时第三人称单数用doesn't)，didn't (一般...
“<” 不是一个数学符号，而是一个HTML或XML中的特殊字符实体，代表小于号“<”。以下是关于特殊字符”<“的进一步说明：定义：在HTML或XML中，某些字符具有特殊含义，例如小于号”<“和大于号”>“用于定义标签。为了能在网页中正常显示这些特殊字符，需要...
be动词，意思和用法很多，一般的意思是：是，此种用法，有多种变化形式，is，am，are，was，were，being，been，to be.另外，be动词还有成为的意思。根据句子中不同的人称、数和时间，型态，应该选择相应的be动词。协助主要动词构成谓语的词叫助动词（Auxiliary Verb），也叫辅助动词。被协助的动词称作...
B,不规则动词(此类词并无规则,须熟记)小学阶段要记住以下动词的原形和过去式:sing – sang , eat – ate , see – saw , have – had , do – did , go - went , take - took , buy - bought , get - got , read - read ,fly - flew , am/is - was , are - were , say - said ...
动词的分类 Be动词：is,am,are,was,were 助动词：do,does,did,has,have,had 动词 情态动词：can,must,may,should,等 实义动词：run,eat,play,like,等等.陈述句改为一般疑问句的改法：一般疑问句：以be动词、助动词、情态动词为句首,句末有问号（?）的句子.例如：Is she a doctor.她是一名...
He is a student,isn't he?特殊的句型 请注意以下句型的反义疑问句的用法：1．当陈述部分的主语是I , everyone, everything, nobody 时，后面的疑问句应表示为：I am a student, aren’t I ?Everyone is in the classroom, aren’t they? (基本不用单数）Nobody will go, will they?2....
Broadcaster:(Beeping)No last names,Jonah.you sound younger than our usual callers.How old are you? J:I'm eight! Broadcaster:Eight?How come you're up so late? J:It's not that late in Seattle. Broadcaster:Oh of course you're absolutely right.All right,what's your Christmas wish,Jonah...
We are firends. [名词作表语] 我们是朋友。You look younger than before. [形容词作表语] 你看起来比以前年前。He isn't in. [副词作表语] 他不在。常常是形容词 来充当；形容词，副词，代词，数次，名词或名词所有格，介词短语，不定式，从句或相当于形容词或短语等都可以担任定语。The ...