Some social workers _____ after the people in need while others ____ out food to the local people.


  1. A.
    looked, gave
  2. B.
    were looking, gave
  3. C.
    were looking, were giving
  4. D.
    looked, were giving
C
試題分析:根據(jù)語(yǔ)境可知此句的含義是一些社會(huì)工作者照顧有需要的人,而其他人提供食物給當(dāng)?shù)厝嗣袢罕。此題重點(diǎn)考查的是while引導(dǎo)的狀語(yǔ)從句表示當(dāng)…的時(shí)候。其強(qiáng)調(diào)的是兩個(gè)動(dòng)作同時(shí)進(jìn)行,并且經(jīng)常用進(jìn)行時(shí)態(tài),故選C。
考點(diǎn):過(guò)去進(jìn)行時(shí)的用法。
點(diǎn)評(píng):when,while都有“當(dāng)……時(shí)候”的意思。when既可表示某一點(diǎn)時(shí)間,也可以表示某一段時(shí)間 。在when引導(dǎo)的時(shí)間狀語(yǔ)從句中,其謂語(yǔ)動(dòng)詞可以是延續(xù)性的,也可以是非延續(xù)性的,可與主句中的謂語(yǔ)動(dòng)詞同時(shí)發(fā)生,也可在其后發(fā)生。while只能表示某一段時(shí)間,不能表示某一點(diǎn)時(shí)間。在while引導(dǎo)的時(shí)間狀語(yǔ)從句中,其謂語(yǔ)動(dòng)詞只能是延續(xù)性的,而且也只能與主句中的謂語(yǔ)動(dòng)詞同時(shí)發(fā)生或存在。如主句謂語(yǔ)動(dòng)詞表示的是短暫動(dòng)作,從句時(shí)間狀語(yǔ)指一段時(shí)間,when while 可通用。
while引導(dǎo)的時(shí)間狀語(yǔ)從句多用進(jìn)行時(shí)態(tài),而when引導(dǎo)的時(shí)間狀語(yǔ)從句多用一般時(shí)態(tài)。
while 和 when在過(guò)去進(jìn)行時(shí)中的用法:表示兩個(gè)持續(xù)性的動(dòng)作在過(guò)去同時(shí)發(fā)生用while,when后接一個(gè)短暫性的動(dòng)作。持續(xù)性的動(dòng)作用過(guò)去進(jìn)行時(shí),自然也就是要+ing了,短暫性的動(dòng)作用一般過(guò)去時(shí),所以不+ing.所以是while后的動(dòng)作+ing,when后的動(dòng)作一般不+ing
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