牛津译林版课件：Unit3Revision(共28张PPT).pptVIP

* Revision screen main unit 主机 mouse 鼠标 screen 屏幕 keyboard 键盘 Different parts of a computer search for information do word processing play games send and receive e-mails People use computers to ... watch videos chat with friends search for information watch videos chat with friends play games do word processing send and receive e-mails Activity: I say, you click search for information watch videos chat with friends play games do word processing send and receive e-mails Activity: I say, you click I used the QQ number 5 years ago. I have used the QQ number for 5 years.I taught Xiao Bao 18 years ago. He has been to Australia many times. He has already become an Australian . I have already set up my QQ space. Xiao Bao visited my QQ space last night. I have used the QQ number for 5 years. He has been to Australia many times. I have already set up QQ space. I used the QQ number 5 years ago. I taught Xiao Bao 18 years ago. Xiao Bao visited my QQ space last night. 一般过去：在过去时间发生动作，和last .., ..ago连用。 现在完成：过去发生持续到现在，和for\since连用. 现在完成：直到现在动作发生的次数，和once, twice连用. 现在完成：强调动作造成的结果, 和already,yet连用 1.I (begin) to play LOL 3 years ago. 2.I (play) LOL for 3 years. began have played 3.I (watch) Running Man last night. 4.I (watch) Running Man several times. watched have watched My QQ friend Xiao Bao has never been to Lishui. This morning we chatted on QQ. Bao： you (arrive) in Lishui yet? David：Yes, I (arrive) at 5:00 p.m.yesterday. Bao : What you (do) last night? David : I (taste) some local food and (take) some photos. Bao : you (visit) any places of interest yet? David : No, I haven’t. This afternoon I will go to Shijiu Lake. Bao : Lucky you! I never (be) there. I dream