Difference Between Which and That

Thekey differencebetween which and that is their usage;we usethatwhen there is necessary information in the clause you are adding while we usewhichwhen there is extra information and non-essential information in the clause you are adding.

Since people often mix up the two relative pronounswhichandthatin writing sentences, getting to know the difference between which and that is only going to help you to use English correctly and with more understanding. You should always remember that there is a subtle but important difference between which and that when used in a sentence.

CONTENTS

1.Overview and Key Difference
2.What Does Which Mean
3.What Does That Mean
4.Side by Side Comparison – Which vs That in Tabular Form
5.Summary

What Does Which Mean?

The relative pronounwhichis used for non-restrictive relative clauses. Let’s first see what is a non-restrictive clause and a restrictive clause.

Aclauseis a part of a sentence; arelative clausetells us which person or thing (or what kind of person or thing) the speaker is referring to. There are two types of the relative clause, restrictive and non-restrictive. Non-restrictive clauses give additional information about something, not essential information.

For example,

“James told me about his new job, which he’s enjoying very much.”

“His car, which was admired by everyone, was stolen yesterday.”

In these sentences, the relative clauses do not tell you which things the speaker means. We already know which things are meant; James’s job and his car. These are additional information. The relative clauses here give additional information, not essential information. These are non-restrictive clauses. Moreover, we use a comma with these clauses.

What Does That Mean?

The relative pronounthatis used for restrictive clauses. A restrictive clause adds essential information about a clause. For example,

最近的商店在哪里卖报纸吗?

Kathy works for a company that makes furniture.

The above sentences contain restrictive clauses. They add essential information to the sentences. Moreover, we do not use commas with these clauses.

To make it easier to remember, whenever the information you want to communicate is essential in identifying the noun, the proper pronoun to use is ‘that.’ If the information is not essential, or can be set apart with commas, then the pronoun ‘which’ is more likely to be correct.

If you are not sure whether the relative clause is essential or not, you can simply try by removing the relative clause and ask yourself if the sentence sounds complete and informative.

What is the Difference Between Which and That?

Whichis used with a comma for non-restrictive relative clauses whilethatis used without comma for restrictive relative clauses. This is the key difference between which and that. Moreover, we use that when there is necessary information in the clause you are adding while we use which when there is extra information and non-essential information in the clause you are adding.

Summary – Which vs That

If you get a clear idea about restrictive and non-restrictive clauses (restrictive – necessary; non-restrictive –extra & non-essential), then all that you need to remember is use ‘that’ without comma for restrictive relative clause and if the clause is non-restrictive relative use ‘which’ with a comma.

Image Courtesy:

1. “5895331” (CC0) viaPixabay

2. “154528” (CC0) viaPixabay

Further Reading:

1. Difference Between Which and What
2. Difference Between Which and In Which in English Grammar
3. Difference Between Which and Who in English Grammar
4. Difference Between This and That in English Grammar
5. Difference Between It and That