1.定语从句转换成不定式短语。

　　定语从句中的谓语动词是将来时或含有情态动词时，往往可把从句转化为不定式短语，从句中的情态动词可以省略，不定式的逻辑主语也可省略，但介词+关系代词引导的限制性定语从句转换成不定式短语时，关系代词可省略，介词不可省。如： This is the best thing that we can do in memory of our beloved teacher.→This is the best thing to do in memory of our beloved teacher. The next train which will arrive if form Beijing.→The next train to arrive is from Beijing. He is a good person with whom you can work.→He is a good person to work with.

　　2.定语从句转换成分词短语。

　　如果定语从句中的谓语动词是主动语态，用现在分词短语来替换从句；如果定语从句中的谓语动词是被动语态，则用过去分词短语来替换从句。如： The man who is standing over there is my Enging teacher.→The man standing over there is my English teacher. Yesterday we had a meeting which lasted two hours.→Yesterday we had a meeting lasting tow hours. The books which were written by him are very popular.→The books written by him are very popular.

　　3.定语从句转换从形容词短语。

　　如果定语从句中的表语是形容词短语，可把从句中的关系代词和动词be省去，使其转化成形容词短语。如： I have broken the glass which was full of milk.→I have broken the glass full of milk.

　　4.定语从句转换成名词短语。

　　如果定语从句中的表语是名词短语，可以把从句中的关系代词和动词be省去，使其转化成名词短语。如： Li lei,who is a child of only ten,has to do a lot of homework.→Li lei,a child of only ten,has to do a lot of homework.

　　5.定语从句转换成介词短语。

　　如果定语从句中的表语是介词短语，可以把从句中的关系代词和动词be省去，用介词短语作定语。如： In our school there are lots of students who are from the countryside.→In our school there are lots of students from the countryside.

　　6.定语从句转换成单个形容词或分词。

　　如果定语从句中作表语的是单个的形容词、现在分词或过去分词，常可把这个形容词或分词放在所修饰的前面作定语。如： The child who is sleeping is my little brother.→The sleeping child my little brother. The man who looked tired stopped to have a rest.→The tired man stopped to have a rest. The picture that looked brautiful was taken by my father.→The beautiful picture was taken by my father.