1、邏輯詞：
表示轉(zhuǎn)折：
but,yet,however, nevertheless ( [,n?v?e?'l?s]adv. 然而，不過；雖然如此;conj. 然而，不過) ,nonetheless ( ['n?ne?'l?s] adv. 盡管如此，但是)
表示對(duì)比或選擇：
either...or..., whereas (['w?r'?z]conj. 然而；鑒于；反之), while, rather than, in contrast, on the contrary, on the other hand, whether...or.., otherwise, instead of
表示原因：
because, for, for, as, since
表示結(jié)果或目的：
so, thereof, thus, so...that, in order that, lest, (so) that
表示并列和遞進(jìn)：
and, neither...nor..., not only...but also, as well as, moreover, futhernore, besides, in addition
表示條件：
if, unless, supposing (that)...,provided/providing (that), only if, in case (that), in the event (如果；結(jié)果), so/as long as, on condition that, assuming (that)
2、分析句子主干，理解句子意思
a. 判斷句子成分是否有誤
多出現(xiàn)于有從句的復(fù)雜句中，缺動(dòng)詞之類的。（少考）
b. 動(dòng)詞時(shí)態(tài)是否有誤
1、賓語從句
若主句為現(xiàn)在時(shí)、將來時(shí)、現(xiàn)在完成時(shí)，賓語從句的謂語動(dòng)詞視情況而定
若主句為過去時(shí)態(tài)，賓語從句一般用過去時(shí)態(tài)。但是客觀真理，用一般現(xiàn)在時(shí)
2、時(shí)間和條件狀語從句中，常用現(xiàn)在時(shí)表示將來
if引導(dǎo)的非真實(shí)條件句中，或在由otherwise, without, or, but for, but that, given, provided, were it not far等引導(dǎo)的含蓄條件句中，主句謂語動(dòng)詞需使用虛擬語氣，即表過去時(shí)用would/ should/ could/ might+ have done，表現(xiàn)在和將來時(shí)用would/ should/ could/ might+ do
3、表示建議、命令、要求、主張、愿望等主觀傾向性概念的動(dòng)詞、名詞（如advise, suggest, suggestion, order, reconmmend, propose, ask, command, insist, demand, desire, beg, require, propose, urge, decide, determine），其后的名詞性從句需用虛擬語氣，即（should）+動(dòng)詞原形
4、"it is (about/high) time that..."，that從句中的謂語動(dòng)詞常用一般過去時(shí)，that可省
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