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"which is" vs "that is"

Both 'that is' and 'which is' are correct, but they are used in different contexts. 'That is' is used to provide essential information about a noun, while 'which is' is used to provide additional, non-essential information. The choice between them depends on whether the information is necessary for the sentence to make sense.

Last Updated: March 20, 2024

which is

This phrase is correct and commonly used in English to provide additional, non-essential information about a noun.

Use 'which is' when you want to provide extra information that is not necessary for the sentence to make sense. It is often used to add descriptions or details.

Examples:

  • The book, which is on the table, is mine.
  • I need the pen, which is in your bag.

Alternatives:

  • that is
  • who is
  • what is
  • where is
  • when is

that is

This phrase is correct and commonly used in English to provide essential information about a noun.

Use 'that is' when you want to provide essential information that is necessary for the sentence to make sense. It is often used to define or clarify a noun.

Examples:

  • The book that is on the table is mine.
  • I need the pen that is in your bag.

Alternatives:

  • which is
  • who is
  • what is
  • where is
  • when is

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