I ate too many crisps and now have a stomachache

[Ephrieve]

Hi.

Why is Past Simple being used in green sentence instead of Present Perfect?

- It's lunchtime, everyone!
- I don't want lunch, Mum. I ate too many crisps and now have a stomachache.

The action have happened in the near past and is still relevant now, seems like Present Perfect to me or Past Simple is also acceptable in this case?
The sentence was taken from Go getter 3 Student's Book.

 

[emsr2d2]

Why is the past simple being used in the green sentence instead of the present perfect?

- It's lunchtime, everyone!
- I don't want lunch, Mum. I ate too many crisps and now have a stomachache.

The action have happened in the near past and is still relevant now, so it seems like the present perfect to me. or Is the past simple is also acceptable in this case?

The sentence was taken from Go Getter 3 Student's Book.

Note my corrections above. Don't capitalise the names of tenses. They're not proper nouns.

I'd prefer the present perfect in that sentence but the past simple isn't incorrect.

 

[jutfrank]

I would guess that one factor would be that the book hasn't introduced the present perfect by this point.