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I had a look before deciding to post this, but nothing really answers what I
am specifically looking for.

From my understanding the following is correct (let me know if I am mistaken):

> 宿題を **してしまいました** か？ Did you finish your homework? - Bringing something to a
> close or finish
>
> 宿題を忘 **れてしまいました** 。 I forgot my homework. - To accidentally do or not do
> something.

**However I don't quite understand what it means when used with ば conditions.
I think it may mean "All I have to do is ~" but I am not sure. For example:**

> 宿題を **してしまえばいい** 。 _(not sure if this is even grammatically correct)_ All I
> have to do is my homework.
>
> 逃げ **てしまえばいい** 。 All I have to do is run away.

If someone could please explain this to me using some more example sentence
that would be great. Thanks.
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2020-03-16T07:09:07.113
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2020-03-17T12:45:06.453
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question
grammar
Differing meanings of ～しまう
～てしまえばいい usually means "It's better to just do ～ (despite the risk)", "should
stop worrying and do ～ ", etc. Here are related questions:

  * [What are these forms: かけちゃお, つないじゃお?](https://japanese.stackexchange.com/q/4781/5010)
  * [「言っちゃったほうが、」の意味](https://japanese.stackexchange.com/q/61076/5010)

逃げてしまえばいい means something nuanced like "(Rather than confronting the
difficulty) [I/you] should stop worrying and just run away".

宿題をしてしまえばいい is grammatically correct, but is semantically unlikely to happen.
This may be used in a rare situation where doing homework right now might be a
bad idea.
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2020-03-16T12:38:30.280
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answer