What is he doing vs What's he doing

When to use each in English, with meaning, register, and examples.

What is he doing

Top 2,000 (common)

What's he doing

Top 2,000 (common)
 What is he doingWhat's he doing
Pronunciation🇬🇧 //wɒt ɪz hi ˈduːɪŋ//🇺🇸 //wɑt ɪz hi ˈduɪŋ//🇬🇧 //wɒts hiː ˈduːɪŋ//🇺🇸 //wɑts hi ˈduɪŋ//
MeaningA question asking about someone's action.A way to ask what someone is currently doing.
ExampleWhat is he doing with that strange gadget?I wonder what's he doing right now.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
Collocationsask what he is doing, wonder what he is doing, learn what he is doingask what's he doing, wonder what's he doing, see what's he doing
Common mistakesForget to use 'is' instead of 'are' for singular subjects., Omit 'he' when asking about a third person., Use incorrect tense when describing ongoing actions.Forgetting to use the contraction 'he's' instead of 'he is'., Using 'what does he doing?' instead of the correct form., Forgetting to put a question mark at the end.
Usage notesUse this phrase to ask about someone's current activity. It's suitable for informal conversations but can also be used in formal contexts, especially when clarity is needed.Use this question in conversations when you want to know about someone's activity. It's common in both casual and semi-formal contexts but may sound out of place in very formal situations.

See it in real clips

What is he doing
What's he doing

Frequently asked questions: What is he doing vs What's he doing

What's the difference between What is he doing and What's he doing?

What is he doing: A question asking about someone's action. What's he doing: A way to ask what someone is currently doing.

Can you show an example of each?

What is he doing: What is he doing with that strange gadget? What's he doing: I wonder what's he doing right now.

Can I use What is he doing and What's he doing interchangeably?

Not always. What is he doing and What's he doing are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.