1、副詞短語（Adverbial phrase）

As soon as Mike received the good news, he called his friends. （逗號(hào)前的句子都是描述called這個(gè)動(dòng)詞，為副詞短語。)

Only once in a while did the alumni students visit their old school. (副詞短語修飾動(dòng)詞)

2、名詞短語（Noun phrase）

The man who opened the door 【結(jié)構(gòu)為：主語+形容詞從句，此句不是句子，缺少動(dòng)詞，而只是名詞短語】

The dog inside the house 【結(jié)構(gòu)為：主語+介詞短語，缺少動(dòng)詞，是名詞短語】

3、介詞短語（Prepositional Phrase）

可充當(dāng)形容詞或副詞，本身不是句子。

The red sports car in the driveway was not mine. (前面是名詞，充當(dāng)形容詞)

She was moving into the house next door. (前面是動(dòng)詞，充當(dāng)副詞)