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【答案】1. sunday Sunday 2. cry crying 3. see saw 4. in for
【解析】
1.Today is sunday.应改为:Today is Sunday. 星期日的首字母要大写:Sunday.
2.A boy is cry.应改为:A boy is crying. be doing是正在进行时,所以is后面要用crying,A boy is crying.一个男孩正在哭。
3.I see her yesterday.应改为:I saw her yesterday.意思是:我昨天看见她了。yesterday是昨天,句型是一般过去时,动词要用过去式:saw.
4.Thank you in your help.应改为:Thank you for your help.谢谢你的帮助。