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If in doubt...

Phrase of the day

Discover a new phrase each day to use in your English! These are special phrases and sayings that English speakers use all the time, but you don't often see these phrases in English course books or other study material. Visit daily to learn some popular English phrases on a regular basis.

17 April 2026

If in doubt...

We use this expression to introduce an action that you should always do if you are not sure what to do.

Written: Yes

Spoken: Yes

Formal: No

Informal: Yes

Example 1

When I go to the shop, should I lock the door, or leave it open?

If in doubt, lock the door. You don't want somebody to burgle you.

Example 2

Should I put nuts in Janice's birthday cake? I think she might be allergic to them.

If in doubt, leave them out.

Okay, that's what I'll do.

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