現在進行時
現在進行時的基本用法: a. 表示現在( 指說話人說話時) 正在發生的事情。 We are waiting for you. b. 習慣進行:表示長期的或重複性的動作,說話時動作未必正在進行。 Mr. Green is writing another novel. (說話時竝未在寫,衹処於寫作的狀態。) She is learning piano under Mr. Smith. c. 表示漸變的動詞有:get, grow, become, turn, run, go, begin等。 The leaves are turning red. It's getting warmer and warmer. d. 與always, constantly, forever 等詞連用,表示反複發生的動作或持續存在的狀態,往往帶有說話人的主觀色彩。 You are always changing your mind.
典型例題 My dictionary ___, I have looked for it everywhere but still___ it. A. has lost, don't find B. is missing, don't findC. has lost, haven't found D. is missing, haven't found. 答案D. 前句是一個仍在持續的狀態,應用進行時,由於沒有找到,其影響仍然存在,應用完成時,瞬間動詞用於否定式時可用於完成時。