Sentence: "Vera is knitting there."
Would a linguist rate this sentence to be acceptable linguistically?
A: acceptable

Sentence: "It tends to be warm in September."
Would a linguist rate this sentence to be acceptable linguistically?
A: acceptable

Sentence: "Fanny regretted being talking to Mary."
Would a linguist rate this sentence to be acceptable linguistically?
A: unacceptable

Sentence: "The problem disappeared."
Would a linguist rate this sentence to be acceptable linguistically?
A:
acceptable