with 主要意思有：和...；随着...。within是在...之内；在内部。
以下是英语语法的相关介绍：
英语语法是针对英语语言进行研究后，系统地总结归纳出来的一系列语言规则。英语语法的精髓在于掌握语言的使用。
感叹词是用来表示说话时表达的喜、怒、哀、乐等情感的词。它不构成后面句子的一个语法成分，却在意义上与它有关联，后面的句子一般说明这种情绪的性质、原因。感叹词是英语口语中最富有表现力的词语之一，用途甚广。
动词不定式：由to+动词原型构成。不定式是一种非限定性动词。而非限定动词是指那些在句中不能单独充当谓语的动词，可分为不定式、动名词、现在分词和过去分词。
以上资料参考百度百科——英语语法
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第1个回答 2017-12-24
with 主要意思有：和...；用.；随着...,
例如：go to school with Tom; Come with me!
With this form, you can apply for the Visa. Cut this with a knife.
With the development of the economy, China has gained more respect..
within是在...之内；在内部.
例如： Within 3 days, he will arrive here.
It is within my reach.
A small voice called from within.
Within a society, organization. or system...本回答被网友采纳
例如：go to school with Tom; Come with me!
With this form, you can apply for the Visa. Cut this with a knife.
With the development of the economy, China has gained more respect..
within是在...之内；在内部.
例如： Within 3 days, he will arrive here.
It is within my reach.
A small voice called from within.
Within a society, organization. or system...本回答被网友采纳
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