modality N1 uncommon casualwritten

〜たことにする — to pretend that ~ happened

〜たことにする ・ たことにする
Builds on た形 こと

Meaning

Key sentence

I'll pretend I didn't hear what you just said.

Formation

Attaches toFormExample
Verb た-form (or なかった for the negative) + ことにする V-た/V-なかった + ことにする たことにする / かなかったことにする

Examples

With him, please let it stand that I knew nothing about it.
You can't just make a failure out to have never happened.

When you can't use it

Easily confused with

See 〜たことにする in real sentences

Jengo shows 〜たことにする the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.

Study it in Jengo

Sources Compiled from published Japanese grammar references.

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