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UK//ðæts waɪ//US//ðæts waɪ//

Meaning of That's why

Used to give a reason for something previously mentioned.

In simple words: This is the reason.

That's why in a sentence

  • The project was delayed. That's why we need an extension.
  • She arrived late. That's why we missed the beginning of the movie.
  • It rained all week. That's why the picnic was canceled.
  • He was feeling sick. That's why he didn’t come to the party.

How to use That's why

Use 'that's why' to explain or justify a statement. It's suitable for conversation and informal writing, but may be less formal in essays.

Grammar pattern

standalone phrase

Memory hint

Think of 'that's why' as a bridge connecting a reason to an explanation.

Related words

Collocations with That's why

  • that's why I
  • that's why we
  • that's why she
  • that's why they
  • that's why he

Synonyms for That's why

Common mistakes with That's why

  • 'That's why' is sometimes confused with 'that's because', which has a slightly different use.
  • Learners often forget to follow 'that's why' with a clear explanation.
  • Some may use 'that's why' in overly formal contexts, where a more precise term is needed.

Compare That's why with Therefore, Hence, Thus, Consequently

That's why appears in

That's why in other languages

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Frequently asked questions about That's why

What does That's why mean?

This is the reason.

What is the definition of That's why?

Used to give a reason for something previously mentioned.

How do you use That's why in a sentence?

The project was delayed. That's why we need an extension.

Can you give another example of That's why?

She arrived late. That's why we missed the beginning of the movie.

What are synonyms for That's why?

Common alternatives include therefore, hence, thus, consequently, as a result.

What words go with That's why?

It commonly pairs with that's why I, that's why we, that's why she, that's why they, that's why he.

What are common mistakes when using That's why?

'That's why' is sometimes confused with 'that's because', which has a slightly different use. Learners often forget to follow 'that's why' with a clear explanation. Some may use 'that's why' in overly formal contexts, where a more precise term is needed.

How do you pronounce That's why?

US: //ðæts waɪ//, UK: //ðæts waɪ//. Listen to the audio above to hear native pronunciation.

When should I use That's why?

Use 'that's why' to explain or justify a statement. It's suitable for conversation and informal writing, but may be less formal in essays.