【正文】
等動詞。 Exercise: (1). 邁克正在寫感謝信。 (2). 中國在醫(yī)學(xué)上正迅速發(fā)展。 (3). 明天他們就要乘飛機(jī)來了。 (1). Mike is writing a letter of thanks. (2). China is making great advances in medicine. (3). They are ing by plane tomorrow. Ⅵ . 過去進(jìn)行時 : was / were +動詞的現(xiàn)在分詞 : 表示過去某一時刻或某一段時間內(nèi)正在進(jìn)行的動作句中往往有過去的時間狀語。句中的過去時間狀語往往是 then, at that time, this time yesterday, the whole morning yesterday, at 10:00 last Sunday night等。 昨天一上午他們都在開會。 They were having a meeting the whole morning yesterday. Ⅶ . 現(xiàn)在完成時 1. 謂語構(gòu)成: have / has +動詞的過去分詞 2. 現(xiàn)在完成時的使用: 表示到說話時為止已經(jīng)做過的動作,或表示過去已經(jīng)開始持續(xù)到現(xiàn)在的動作或狀態(tài)。 常與 already, yet(用于疑問句或否定句 ), up to now= so far= by now= till now, just, ever, never, recently, in the last/ past few years, in recent years, since two years ago, for a few days 等連用。 Exercises: (1).我還沒做完作業(yè)呢。 (2). 到現(xiàn)在為止她共獲過 五次獎。 I haven’t finished my homework yet. Up till now she has won five prizes. ※ 現(xiàn)在完成時的謂語動詞如果是點(diǎn)動詞,在肯定句中不與表示一段時間的 since短語和 for短語連用。如 :