Put two and two together means working something out from a few clues, even though nobody explained anything. An empty desk and a missing coat: we put two and two together and realised our colleague had gone home. The conclusion is usually simple and obvious. Put doesn't change in the past, so the phrase works just as well for yesterday.
When would you say put two and two together?
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put two and two together and realize / work out something
- I saw the cake boxes and the balloons, then put two and two together.
- When her desk was empty and her coat was gone, we put two and two together.
- He put two and two together and realized the unexpected parcel was a birthday present.
What changed
First versionShe put two and two altogether and guessed who had left the flowers.
RevisionShe put two and two together and guessed who had left the flowers.
Together and altogether sound almost the same, so they're easy to mix up. But altogether means completely or in total, and the idiom needs together: put two and two together. One word was changed.
A shot in the dark is a guess with nothing to go on. Put two and two together is a conclusion from visible clues. The joking extension put two and two together and make five means jumping to a wrong, exaggerated conclusion: He saw us talking and put two and two together and made five.
Your turn
The clues were obvious, so I put two and two ___.
Show the answer
together — The idiom needs together. Altogether means completely or in total, and it doesn't fit here.
Write about a time you guessed a surprise or some news from a couple of small details.
I noticed the packed suitcase and the airport map, put two and two together, and guessed she was travelling.
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