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TVOC谱图及标准曲线

上传者:非学无以广才 |  格式:doc  |  页数:4 |  大小:74KB

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. ---- There isn’t any water in the bottle .Р五、There be 句型与have/has 的区别. РThere be 表示在某地存在有某物.There is / are 其过去式为 There was/ wereРThere is + a /an+ 可数名词单数+ 地点(in/on /under/ in front of ..) РThere are + 名词的复数形式+ 地点.Рhave/ has 用于表达某人拥有某物.РI have three pens and she has only one pen.Р六、some和 any 的区别.Рsome用于肯定陈述句中或征求对方意见,希望得到对方的肯定回答的一般疑问句中. 如: There is some drink in the fridge.РCan I ask you some questions ? Can I have some water ? РWould you like some apples ?Рany 用于否定句和疑问句中. Is there any drink in the fridge?Р No, there isn’t any drink in the fridge.Р七、There be 口诀РThere be有特点,主语放在be后面,Р单数主语用 is,复数主语要用are。Р变否定很简单, be 后要把not添。Р变疑问也不难, 把be提到there前。Р否定疑问any换,就近原则多多练。Р八、语音: Р/au/ house mouse sound count cloudy mountain about Р /u/ would could should Рou /u:/ soup coup groupР /ʌ/ young touch enough

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