Question

1．在春季可以使用什么方法來提防感冒？
What method can be used to guard against catching a cold in spring？．

Answer 1

分析 What method can be used to guard against catching a cold in spring？

解答 答案：What method can be used to guard against catching a cold in spring？這里是說客觀事實(shí)用一般現(xiàn)在時(shí)，是一個(gè)特殊疑問句，疑問詞是what method表示什么辦法作為主語，是動(dòng)詞use使用的承受者，兩者構(gòu)成被動(dòng)關(guān)系，情態(tài)動(dòng)詞can表示能，可以故這里用情態(tài)動(dòng)詞的被動(dòng)語態(tài)-情態(tài)動(dòng)詞+be+過去分詞，故can be used，后加動(dòng)詞不定式to do，實(shí)則是be used to do sth表示被用來做什么，預(yù)防用短語guard against，后加動(dòng)名詞短語catching a cold表示感冒，加上時(shí)間狀語in spring，故答案是What method can be used to guard against catching a cold in spring？

點(diǎn)評(píng) 這里是be used to do sth的用法，要與be used to doing sth表示習(xí)慣于…區(qū)分開．