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1、some
用于肯定句中，在否定句和问句中改为any,但当表示委婉语气时仍用
如：Can I have some writing paper? Would you like some orange juice?
2、代词
人称代词主格做主语用一般放在句首或动词前，主格分别是 I you he she it we you they。
宾格做宾语用，一般放在动词或介词后
如：Open them for me. Let us …, join me等。
宾格分别是me you him her it us you them。
形容词性物主代词放在名词前，不能单独使用，分别是my your his her its our your their
名词性物主代词相当于形物加名词，它只能单独使用后面不好加名词，分别是mine yours his hers its ours yours theirs
3、介词
介词后要么不加动词，加动词只能加动词ing形式
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如：be good at running;
do well in jumping;
4、时间介词
季节前，月份前用介词in
如：in summer;in March
具体的哪一天如星期几，几月几日用介词on
如：on Saturday; on the second of April; on Wednesday morning
在几点钟前用介词at
如： at a quarter to four;
只在上下午晚上用in
如：in the morning/ afternoon/ evening;
但在夜间用at night。
另：季节，月份和星期前不好加the.