What happened vs What'd you do

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

What happened

Top 2,000 (common)

What'd you do

InformalTop 2,000 (common)
Most formal: What happened
 What happenedWhat'd you do
Pronunciation🇬🇧 //wɒt ˈhæp.ənd//🇺🇸 //wɑt ˈhæpənd//🇬🇧 //wɒt dʒə du//🇺🇸 //wɑt dʒə du//
MeaningAsk someone about an event or situation.What did you do?
ExampleCan you tell me what happened during the meeting?After the weekend, I asked my friend, 'What'd you do?'
RegisterNeutralInformal
How commonTop 2,000 (common)Top 2,000 (common)
Collocationswhat happened next, what happened then, can you tell me what happenedask what'd you do, heard what'd you do, wonder what'd you do
AntonymsWhat will happen, What is going to happen, What occurs next-
Common mistakesConfused with 'what's happening?' which refers to current events., Using it to ask about an ongoing situation instead of a past event., Inappropriately using 'happened' in place of 'has happened' in some contexts.Using it in a formal context., Not recognizing it's a contraction of 'What did you do?'., Confusing it with similar phrases like 'What are you doing?'
Usage notesUse in conversations to inquire about past events. Suitable in both formal and informal settings.Used in casual conversations, typically when asking someone about their recent actions or experiences. Not suitable for formal or professional contexts.

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What happened
What'd you do

Frequently asked questions: What happened vs What'd you do

What's the difference between What happened and What'd you do?

What happened: Ask someone about an event or situation. What'd you do: What did you do?

Which is more formal: What happened and What'd you do?

What happened is the most formal of these.

Can you show an example of each?

What happened: Can you tell me what happened during the meeting? What'd you do: After the weekend, I asked my friend, 'What'd you do?'

Can I use What happened and What'd you do interchangeably?

Not always. What happened and What'd you do 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.

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