一. 選準關系代詞和關系副詞

在定語從句中，關系代詞或關系副詞都代替先行詞在從句中充當一定的成分，如果該從句中缺少主語、表語、賓語或定語，就要用關系代詞來連接從句;如果從句中缺少狀語，就得用關系副詞來連接從句。例如：

(1)I still remember the days which / that we spent together .

(2)I still remember the days when we worked together .

二. 了解僅用that 引導限制性定語從句的幾種情況

that 在限制性定語從句中既可指人又可指事或物。在下列情況下，只能用that 來引導定語從句：

1. 先行詞是all , much , few , little , everything , anything , nothing 等不定代詞時。例如：

Is there anything that you want to buy ?

2. 先行詞被all , few , little , much , every , some , no 等詞修飾或被the only , the very , the same , the last 等限定詞修飾時。例如：

These are all the pictures that I have seen .

This is the very dictionary that is of great help .

3. 先行詞既指人又指物時。例如：

My father and his teacher talked a lot about the things and the persons that they could remember .

4. 關系代詞在定語從句中作表語時。例如：

Our school is not the one that it used to be .

5. 先行詞被形容詞最高級或序數(shù)詞修飾時。例如：

This is the best English film that I have ever seen .

The first English novel that I read was A Tale of Two Cities .

6. 主句是who 或which 引導的特殊問句時。例如：

Who is the girl that is standing under the tree ?

Which is the machine that we used last Sunday ?

三. 把握“介詞+關系代詞”結構中介詞的選用

介詞的選擇與主句中先行詞的搭配密切相關。例如：

That”s the reason for which he was late for school .

This is the book on which I spent 8 yuan .

注意：

1. 定語從句中謂語動詞是含有介詞的動詞短語時，介詞應放在動詞之后，不能拆開放在關系代詞前。例如：

This is the key which you are looking for .

This is the baby whom you will look after.

2. 該結構中，關系代詞指人時用whom，指物時用which .

四. 弄清as 和which 引導的非限制性定語從句指代整體時的區(qū)別

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