9A Unit 3I. 知识讲解1、Everybody has problems sometimes.有时，每个人都有问题。
分清楚sometimes, sometime, some time 和some times的用法▲sometimes 用作副词，意为“有时”。
可以放在句首、句尾，也可放在行为动词之前或情态动词、助动词之后。
如：Sometimes he goes to see his parents.有时他去看望他的父母。
▲some time 是名词性短语，意为“一些时间”。
如：He will spend some time in the countryside.他将在农村度过一段日子。
▲sometime,用于将来时的句子中，意为“在未来某个时间”“总有一天”，如用在过去时的句子中，则表示“曾经”。
如：I think he will come sometime.我想他总会来的。
2． It﹐s very noisy at home.家里很吵。
分清楚noise，sound，voice的用法▲ noisy 用作形容词，意为“吵闹的”“嘈杂的”，在句子中作表语或定语。
如： Don﹐t be so noisy ! Jim is sleeping.别吵了，吉姆在睡觉。
▲noise 用作名词，意为“噪声，噪音，杂音”等，是不可数名词，前面常用some，much, a lot of ,lots of 等修饰。
它通常指人们不愿意听到的、不悦耳的、令人讨厌的声音。
如：Don﹐t make so much noise.别发出这么多噪音▲noisily是noisy的副词形式，它的意思是“吵闹地”，在句子中主要用来做状语。
修饰动词。
如：The students went out of the classroom noisily.那些同学生喧哗地走出了教室。
▲sound 指“声音”时，意义最广泛，可以指人们听到的各种声音，包括大的，小的，好听的，难听的，是一个中性词。
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