定語 從句由關係詞（關係代詞、關係副詞）引導，關係代詞、關係副詞位於定語從句句首。下面是小編為你帶來的不能用that的定語從句 ，歡迎閱讀。
不能使用that的.定語從句
1、主句與從句用逗號隔開，先行詞是物時，只用which，不用that。
She heard a terrible noise, which brought her heart into her mouth.
2、關係代詞前有介詞時。(關係詞前有介詞時，關係詞只能為which或whom)
This is the hotel in which you will stay.
Who is the teacher to whom Lily is talking?
3、先行詞是one(s)、anyone、someone、those時，關係詞使用who。
Those who want to go to the Great Wall sign up here.
定語從句注意事項
注意：
一、which與that指物時可互相代替，但也有隻能用that不能用which引導的定語從句：
口訣：兩代限形特疑序
①兩：先行詞詞中同時含有“人”和“物”的名詞時，定語從句只能用that引導。
I can remember the persons and the pictures that I saw in the room.
②代：先行詞為everything、something、anything、nothing、all、none、much、little、few等不定代詞或被這些不定代詞修飾時，定語從句只能用that引導。
Here is all the money (that) I have.
③限：先行詞同時又被the only、the very或the right修飾時，定語從句只能用that引導。
It is the only word that I know in the passage.
④形：先行詞同時又被形容詞最高階修飾時，定語從句只能用that引導。
This is the most interesting story that I have ever heard.
⑤特疑：當主句是who或 which開頭的特殊疑問句時，用that引導定語從句。
Who is the girl that won the first place?
⑥序：先行詞同時又被序數詞修飾時，定語從句只能用that引導。
This is the first composition that he has written in English.
二、關係詞的省略
關係詞在從句中作賓語可省略;但關係代詞which, whom在從句中做介詞的賓語且介詞位於關係代詞前時，不可
以省略;that、which、who在從句中做主語時，不能省略。
1、The boy (who/ that) I like isn’t here now.(作賓語，可省略)
2、I’ll never forget the day on which I joined the army.
3、Who is the boy that is talking with our teacher?
注：判斷關係詞的成分可以通過還原法，即把先行詞帶入從句 中，先行詞的成分就是關係詞的成分。
三、whose 指人，也可指物，表示某人的或 某物的，在從句中作定語，不可省略。Please show me the book whose cover is red.
關係副詞
關係副詞用來引導定語從句時，在句中作狀語。
Where—修飾地點詞，在從句中做地點狀語。
When—修飾時間詞，在從句中做時間狀語。
Why—修飾reason，在從句中做原因狀語。
拓展：關係副詞和關係代詞的比較
1. I know a place where we can have a picnic.
I know a place which/that is famous for its beautiful natural scenery.
2. I will never forget the days when we spent our holidays together.
I will never forget the days that / which we spent together.
3. This is the reason why he was dismissed.
This is the reason that / which he explained to me for his not attending the meeting.
結論：先行詞做狀語用where/when/why，做主語，賓語時用關係代詞that、which。
