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主句用一般將來時態(tài),從句用一般現(xiàn)在時態(tài)。如: We can walk there if we can39。t find a bus. If it rains tomorrow, we will not go to the zoo. What will you do if you find a panda in danger.如果 if 條件句談?wù)摰氖侵貜?fù)發(fā)生和預(yù)示要發(fā)生的情景和事件,則主從句大多用一般現(xiàn)在時態(tài)。如: If bears are in danger, they attack people.注意 :在 if 引導(dǎo)的條件狀語從句中,if 和條件句位置靈活,可直接放在主句后面,若 if 條件句放句首,從句后面要加逗號,和主句隔開。還要注意前后時態(tài)一致原則。13.________it’s Sunday tomorrow, we have to go to school.A.Though B.Since C.As D.Because【答案】A【解析】【詳解】句意:盡管明天是星期天,我們不得不還要上學(xué)??疾閺膶龠B詞。根據(jù)后文we have to go to school我們不得不去上學(xué)。可知前面從句應(yīng)表示讓步狀語。故選A。14.I have to leave now __ I can catch the last bus.A.so that B.because of C.until D.a(chǎn)s soon as【答案】A【解析】試題分析:so that以便,所以;because of因?yàn)椋捎?;until直到;as soon as一……就……。句意:為了趕上末班車,我現(xiàn)在必須離開了。結(jié)合語境可知選A??键c(diǎn):連詞辨析點(diǎn)評:連詞在句子中主要起聯(lián)系上下文的作用,他們之間的區(qū)別就是表示邏輯關(guān)系的不同,所以在解題時先要理解上下文含義,然后根據(jù)上下文邏輯關(guān)系選擇合適的連詞。連詞的用法都比較多,語義之間還有交叉,熟記其基本應(yīng)用規(guī)則,了解其區(qū)別,注意固定搭配對象,是做好此類題型的關(guān)鍵。15.—I hear Music and Art will enter the Entrance Examination for the high school.— Yes. but don’t worry. Nothing will be difficult if more attention _____ to them.A.will pay B.will be paid C.is paid D.pays【答案】C【解析】句意:——我聽說音樂和藝術(shù)將進(jìn)入高中入學(xué)考試?!堑?。但別擔(dān)心。如果對他們給予更多的關(guān)注,就不會有困難??疾楸粍诱Z態(tài)。本句是if引導(dǎo)的條件狀語從句,需用一般現(xiàn)在時態(tài)代替一般將來時態(tài);從句主語more attention是單數(shù)第三人稱,又是動詞pay的受動者,需用被動語態(tài),即is+paid結(jié)構(gòu);根據(jù)句意語境,可知選C。16.Henry will give us a report as soon as he _______.A.a(chǎn)rrives B.a(chǎn)rrived C.is arriving D.will arrive【答案】A【解析】【詳解】句意:亨利一到,他就要給我們做一個報(bào)告。當(dāng)主句描述將來動作時,英語條件狀語從句中用一般現(xiàn)在時態(tài)表示將來的動作;主語單三,謂語動詞用單數(shù)形式;故選A。17.Betty you the answer as soon as she works it out later.A.tells B.told C.will tell D.is telling【答案】C【解析】【詳解】句意:貝蒂之后一算出來,她就會告訴你答案。考查時態(tài)。tells告訴,一般現(xiàn)在時;told一般過去時;will tell一般將來時;is telling現(xiàn)在進(jìn)行時。as soon as表示“一……就……”。由as soon as引導(dǎo)的從句需要用一般現(xiàn)在時態(tài)代替將來時態(tài),可知主句時態(tài)是一般將來時。故選C。18.He was so busy preparing for the high school entrance exam that