非謂語動(dòng)詞主要包括to do, -ing和-ed三種形式，可是其用法非常廣泛，它不僅是高考單項(xiàng)選擇題測試的一個(gè)重點(diǎn)，而且也是完形填空、閱讀理解、短文改錯(cuò)的重要考查內(nèi)容。為了能更好地掌握非謂語動(dòng)詞的用法，筆者在教學(xué)實(shí)踐中總結(jié)出十條實(shí)用的解題原則，并且還用相關(guān)的題目來解釋這些原則。根據(jù)這些原則，相信同學(xué)們可以輕松地應(yīng)對非謂語動(dòng)詞。

　　原則一：兩個(gè)句子必須要用連詞連接，如果沒有連詞連接，則需要用非謂語動(dòng)詞

　　例1. _________ many times, but he still couldn’t understand it.

　　A. Having been told B. Having told C. He had been told D. Though he had been told

　　例2._________ many times, he still couldn’t understand it.

　　A. Having been told B. Having told C. He had been told D. Though he had told

　　解析：例1中有連詞but連接，表明前后都是句子，所以答案為C。

　　例2中后面是一個(gè)句子，而且沒有連詞，所以前面不是句子，應(yīng)該用非謂語動(dòng)詞，根據(jù)句意此處為被動(dòng)，所以答案為A。