Can anyone please advise of the rules, as when to use "which" or "that" , as prepositions, in a sentence.
If you are defining something by distinguishing it from a larger class of which it is a member, use “that”: “I chose the lettuce that had the fewest wilted leaves.”
When the general class is not being limited or defined in some way, then “which” is appropriate: “He made an iceberg Caesar salad, which didn’t taste quite right.” Note that “which” is normally preceded by a comma, but “that” is not.
I'd just like to mention that the words which and that are not prepositions. They are pronouns.
I am not a teacher, nor I am a native English speaker;
but I can tell you what I know.
As Philly has pointed out, the word "which" and "that" are relative pronouns.
We often use them before an adjective clause.
I bought the computer you recommanded.
Denny is my friend lended me books.
Nouns are in green color.
Adjective clause are in blue color.
We use relative pronouns to combine nouns and adjective clauses together.
It's actually the nouns determine which relative pronoun we have to use.
When the noun is a thing, we use which or that;
When the noun is a person, we use who or that.
I bought the computer which you recommanded.
Denny is my friend who lended me books.
I bought the computer that you recommanded.
Denny is my friend that lended me books.
Last edited by chichiu57; 18-May-2007 at 02:13.
Just anothr point of view - I try to never use "that" for people. I use who.
I maintain that you use "that" to define which one. I use "which" to provide additional information.
I would never write "I read that book which you recommended" to say which book I read; I would write "I read the book that you recommended."
I would use "which" like this: "I read that book, which you recommended, in one day because I just couldn't put it down."
Re: Prepositions (opps pronouns!)
Many thanks to you all.
I achived my English O' Level (Grade B) some 24 years ago. I am rusty, and I am re-learning the English Language. I am using some goold old fashion text book, for my young son. The text books do not have answers, so I am having to re-learn first principles - to provide him with model answers.
Many thanks again.
Would this be what you are looking for?
Originally Posted by sohala
If you want your preposition at the front of the RC [relative clause] with the relative pronoun, then that pronoun cannot be that:
(6) the building into which
(7) the building into that
Anglika, these examples sound strangely familiar. What site are they from?
Originally Posted by Anglika
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