Question

Our English teacher worked late into the night, ______ the exams for the follow weeks.

1. A.
   to be prepared
2. B.
   prepared
3. C.
   preparing
4. D.
   was preparing

Answer 1

C
該題考查現(xiàn)在分詞短語(yǔ)做狀語(yǔ)。Preparing不是并列謂語(yǔ)動(dòng)詞，而是伴隨狀語(yǔ)，用來(lái)對(duì)謂語(yǔ)的動(dòng)作加以修飾或陪襯；過(guò)去分作伴隨裝語(yǔ)，用來(lái)說(shuō)明動(dòng)作發(fā)生的背景或情況，如Depressed he went to see his sister（他情緒低落就跑去找他的姐姐）。