謂語動(dòng)詞的形式
謂語動(dòng)詞切忌用“行為動(dòng)詞 + 原形動(dòng)詞”、“be + 原形動(dòng)詞”。
情態(tài)動(dòng)詞+原形動(dòng)詞。如:You'd better go over the lesson.(你最好復(fù)習(xí)這一課。)
shall/ will/ would+原形動(dòng)詞。如:They should have been there once.(他們應(yīng)該去過那兒。)
be+現(xiàn)在分詞或者過去分詞。如:What are you doing this evening?(今晚你打算做什么?)/ Many trees have been cut down since 1970s.(自從20世紀(jì)70年代大批樹木被砍伐。)