英语中有九个十分常见的单词，虽然这几个单词很小，但它们却是最难学习和正确使用的单词。
"with", "at", "by", "to", "in", "for", "from", "of", "on ".
什么是介词
英语里有100多个介词，这些词把一个名词连接到另一个名词。它们很难运用，因为它们在各种情况下都可以使用，可以指示时间和地点、方式、目的、状态或条件。
更糟糕的是，它们有时可以互换使用，如在““sit on that chair, sit in that chair”句中。但不用担心，这里有关于如何使用这些介词的规则。
帮助你学习这九个关键介词的一个方法是学习并改编以下句子来描述你自己的生活：
I am from Brazil. I live in Sao Poalo which is west of Rio de Janeiro.
我来自巴西。我住在里约热内卢西部的圣波洛。
My child was born at a quarter to three in the morning.
我的孩子在早上三点出生。
I went on holiday to Prague with my family.
我和家人一起去布拉格度假。
She came by train with her sister for a weeks" holiday last year.
去年她和姐姐坐火车来度假一周。
I like food I can eat with my hands.
我喜欢吃我可以用手吃的食物。
I am on duty later so cannot do a lesson then.
我当班晚，所以不能去上课。
I drive for twenty kilometres to get to work.
我开车20公里去上班。
你想要了解更多吗？ 下面是最常见的英语介词列表。
介词表
about above across after
against along among around
at before behind between
beyond but by concerning
despite down during except
following for from in
including into like near
of off on onto
out over past plus
since throughout to towards
under towards until upon
up to with within without
