【正文】 at指the climate）（二）作無人稱代詞it作無人稱代詞時，除了句中找不到它所代表的詞語外，另一個特點是它后面的內(nèi)容都是表示天氣、時間、距離、度量衡及情況等。It is fine(rainy, windy, etc.).It is is a half hour’s walk to the is eighteen square metres in does it matter?（三）作強調(diào)詞，構(gòu)成強調(diào)結(jié)構(gòu) 用以幫助改變句子結(jié)構(gòu)，使句子的某一成分受到強調(diào)?！癐t is(was)+ 所強調(diào)的成分 + that(who)+ 其它成分。”在這個句型中，it本身沒有詞義。詳見“一、強調(diào)句”。（四）引導(dǎo)詞it作形式主語（賓語）為了使句子平衡，常采用形式主語（或賓語）it，而把真正的主語（或賓語）置于句子后面。通常引導(dǎo)詞it與它所代替的句子成分中間要夾有某些詞。 takes half an hour to go there on foot.（It與to go there on foot之間夾有takes half an hour四個詞）We thought it strange that Mr Smith did not e last night.（it與that從句中間夾有 strange）但有時it與所替代部分之間并不夾有其它詞。 may depend on it that they will support you.（因為介詞on之后一般不直接接that引導(dǎo)的賓語從句。注意：it不是多余的，不能當(dāng)作錯句）第五篇：英語強調(diào)句小結(jié)英語強調(diào)句小結(jié)強調(diào)句子的方法有四種： , hardly, not only, nor, seldom, little, rarely, not until, hardly… sooner …than 等表示否定意義或半否定意義的副詞或詞組開頭的句子中。(1)No sooner had he gone to bed than he fell asleep.(2)Not only did Lincoln set the slaves free, he also reunited the nation.(3)Not until the early years of the 19th century did man know what the heat is.(4)Not until I began to work did I realize how much time I had wasted.(5)Not until all the fish died in the river did the villagers realize how serious the pollution ，不僅可以表示強調(diào)，而且可使句子結(jié)構(gòu)達(dá)到平衡協(xié)調(diào)，使帶有較長修飾語的主語放到句子的后部，以避免頭重腳輕。(6)Such is the little of our home in space when measured up against the total substance of the , however, though 等可引出強調(diào)讓步狀語從句，表示非常強烈的對照。(7)Busy as he always is, Bob never refuses to help others.(8)However late she is, mother will wait for him to have dinner ，須用倒裝語序，only起強調(diào)作用。其句形為“only + 狀語+ 部分倒裝語序”。(9)Only in this way can you make progress in your （主語，賓語，狀語），常用強調(diào)結(jié)構(gòu)：“It is(was)+被強調(diào)部分+that(who)…”。在強調(diào)句中作主句的主語。(10)It was at the gate that he told me the news.(11)Was it during the Second World War that he died?(12)It was about 600 years ago that the first clock with a face and an hour hand was was only when I reread his poems recently that I began to appreciate their ，我們可以將not until用在It be …that ,…”強調(diào)句型中，組成 “It be not until…that…” 結(jié)構(gòu)，not 的否定功能仍不變，用來否定后面的謂語動詞。(14)It was not until she took off her dark glasses that I realized she was a famous film star.(15)It was not until 1920 that regular radio broadcasts began is /was /will be(not)years /months/ weeks/ days/hours/minutes/seconds before….很就（不久）。才（就）。(16)It was not long before the policeman caught the thief.(17)I lost my job and it was several months before I found another 雙重否定結(jié)構(gòu)是由否定詞not, never, nobody, nothing 等與帶否定意義的詞或詞組相配合而構(gòu)成的。雙重否定即否定的否定，實質(zhì)是肯定，而且語氣較為強烈。(18）One is never too old to learn.(19)I don’t think it possible to master a foreign language without much memory work.(20)Without knowledge of science and technology, it is impossible to build our country into astrong and socialist country.(21)Unless he won’t be able to (does/did)引出強調(diào)句（通常是現(xiàn)在時和過去時的肯定句），可用助動詞do(does/did)來強調(diào)動詞,這時謂語動詞須用原形動詞。Do(does/did)可譯成“確實”“的確”。(22)To my great joy， the plant did look exactly like what we were looking for.(23)He does work hard and finish the job in ，用動詞do來加強語氣，可譯成“務(wù)必，一定，千萬”(24)Do e and see us some day.(25)Do give her my regards.