介詞是句子中的精靈，它和動詞組在一起，會增加動詞的強(qiáng)度、亮度，使動詞更具動感，像speak up就比單單speak有力。我們一起來看以下的句子，比較A與B句，你會驚嘆介詞的魅力與表現(xiàn)力。B中出現(xiàn)的at，behind，by，on，with等都是常見的介詞，但這小小的介詞真的起了“畫龍點(diǎn)睛”的作用。

　　1. 當(dāng)我聽到這事時，簡直不敢相信自己的耳朵。

　　A：I couldn't believe my ears when I heard this

　　B：I couldn't believe my ears at this．

　　2. 她死后留下6個孩子。

　　A：She left six children after she died

　　B：She left six children behind died.

　　3. 如果需要幫助，就給我打電話，號碼是27215033。

　　A：If you need help，just ring me up．My telephone number is27215033．

　　B：If you need help，just ring me up at 27215033

　　4. 我們舉杯慶祝他的成功。

　　A：We raise a toast to congratulate him on his great success.

　　B：We raise a toast to his great success.

　　5. 這段文章生詞太多，真是太難理解了。

　　A：There are so many ncw words in this passage，so it is hard forme to understand.

　　B：With too many new words in it，this passage is beyond me.

　　6. 他因為30票之差輸了競選。

　　A：He missed election because of 30 votes

　　B：He missed election by 30 votes.

　　7. 證據(jù)對他不利。

　　A：The evidence is not good for him．

　　B：The evidence is against him．

　　8. 我可以幫你完成這個項目。

　　A：I can help you finish the project.

　　B：I can help you with the project.

　　9. 我買單。

　　A：I'll pay the bill.

　　B：It's on me.