1, Win7系统放大镜的快捷键和使用方法是什么?
Win7放大镜用法及快捷键1、打开放大镜的方法:Win + 加号;2、显示鼠标指针:Ctrl + Alt + 空格; 3、切换全屏模式:Ctrl + Alt + F; 4、切换到镜头模式:Ctrl + Alt + L;5、切换到停靠模式:Ctrl + Alt + D;6、反色:Ctrl + Alt + I;7、按箭头的方向平移:Ctrl + Alt + 箭头; 8、调整镜头大小:Ctrl + Alt + R ;9、退出放大镜:Win + Esc!
2, be动词的作用及用法是什么???
be动词的用法 英语的“be”是个特别动词;有些语言,如中文和马来文,并没有“be”这样的动词。 “Be”除了原形的“be”之外,还有另外七种形式:am, is, are, been, being, was, were. 在句子中,“be”可以是主动词(The Principal Verb)或助动词(The Auxiliary Verb). 当主动词时,“be”在性质上属于接系动词(The Linking Verb), 后面要有名词、形容词、地方副词或短语作补足语(The Complement)。例如: 1. The man is a science teacher. 2. Mary"s new dresses are colourful. 3. I have been there before. 4. Mother is in the kitchen now. 这四个都是陈述句,可以变成疑问句,方法简单,把主语和“be”或助动词对换位置即可: 5. Is the man a science teacher? 6. Are Mary"s new dresses colourful? 7. Have I been there before? 8. Is mother in the kitchen now? 当“be”要在祈使句中出现时,它必须借重助动词“do”或“don"t”之助,如: 9. Don"t be silly! 10. Do be obedient! 11. Don"t be a fool! “Be”有两种缩写法,如下: 12. He"s not...../He isn"t.... 13. You"re not...../You aren"t... 但“am + not”的缩写法只有一个: 14. I"m not. 有人用“ain"t”, 但这并不是标准英语。 谈过了“be”作主动词的功能,现在看看“be”作助动词时,有些什么用法: 1.“Be + 现在分词”以组成进行式时态(Continuous Tenses),如: 15. Tony"s maid is washing his new car. 16. The children are playing in the field. 17. Samuel was eating when I came in. 18. We have been living here since 1959. 2.“Be + 过去分词”以组成被动语态(The Passive Voice),如: 19. Her money in the drawer was stolen. 20. A number of good jobs are taken up byforeigners. 21. David studied in Taiwan but has been trained as a language lecturer in America. 22. Can all the wonderful birds be found in our Bird Park? 23. The disobedient boy was told to stand out- side the classroom. 24. Steps are being taken to reduce traffic con- gestion during peak hours. 25. Dishonest students will be immediately dealt with.
相关概念
been
been [美] [bɪn] [英] [biːn] ( be 的过去分词)
助动词
协助主要动词构成谓语的词叫助动词(Auxiliary Verb),也叫辅助动词。被协助的动词称作主要动词(Main Verb)。助动词用来构成时态和语态。 助动词具有语法意义,但没有词汇意义,不可单独作谓语。它没有对应的汉译,例如: He doesn"t like English. 他不喜欢英语。(does是助动词,无词义;like是主要动词,有词义)