Correct phrasing?

[wishwell]

Question #: 10: Sometimes I have seen such a mess. This sentence is correct.
User's answer: False
Correct answer: True
Additional Notes:

I used to think the correct phrasing is:

I have, sometimes, seen such a mess.

[Casiopea]

'sometimes' is a sentence adverb, which means it goes at the beginning or end of the sentence:

Sometimes I go to the movie.
I go to the movies sometimes.

Maybe you're thinking of "often"?

EX: I have often seen such a mess.

Note, 'sometimes' is semantically awkward with present perfect 'have seen'.

[wishwell]

Thanks if it's a rule, it's a rule. I didn't know that one.