介詞短語在句子中可作狀語、定語、表語、補語和插入語等成分。
1. 作狀語
介詞短語作狀語最為多見。例如：
The conference will be held on May 4th, in Beijing. 這個會議將於五月四日在北京舉行。
According to the estimate, five people will be needed for the work. 據估計，這個工作需要五個人。
2. 作定語
介詞短語作定語為後置定語（Post-modifier)。例如：
The building at the end of the street is a hotel. 在這條街道盡頭的那座建築物是一家旅館。
There is much room for improvement in your composition. 你的作文大有改進的佘地。
3. 作表語
例如：
The book you want is on the shelf. 你要的那本書在書架上。
4. 作賓語（或主語）的補足語
We found the map quite out of date. 我們發現這幅地圖已完全過時。
He was often seen at his desk even at midnight. 人們常常看見在深夜他還在辦公。
5. 作插入語（Paraithesis)
On the whole, our stay there was quite enjoyable. 總的來講，我們在那兒的逗留還是相當愉快的。
To my surprise, they succeeded. 使我們驚奇的是，他們成功了。
介詞短語在句子中可作狀語、定語、表語、補語和插入語等成分。
1. 作狀語
介詞短語作狀語最為多見。例如：
The conference will be held on May 4th, in Beijing. 這個會議將於五月四日在北京舉行。
According to the estimate, five people will be needed for the work. 據估計，這個工作需要五個人。
2. 作定語
介詞短語作定語為後置定語（Post-modifier)。例如：
The building at the end of the street is a hotel. 在這條街道盡頭的那座建築物是一家旅館。
There is much room for improvement in your composition. 你的作文大有改進的佘地。
3. 作表語
例如：
The book you want is on the shelf. 你要的那本書在書架上。
4. 作賓語（或主語）的補足語
例如：
We found the map quite out of date. 我們發現這幅地圖已完全過時。
He was often seen at his desk even at midnight. 人們常常看見在深夜他還在辦公。
5. 作插入語（Paraithesis)
例如：
On the whole, our stay there was quite enjoyable. 總的來講，我們在那兒的逗留還是相當愉快的。
To my surprise, they succeeded. 使我們驚奇的是，他們成功了。