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Choose the correct option:
for vs. since
I have been to Paris since a year.
I have been to Paris for a year.
Use for with a duration and since with a specific point in time.
Stative verbs in continuous tenses
She is knowing the answer.
She knows the answer.
Stative verbs like know, believe, and love do not use continuous forms.
Third conditional if-clause
If I would have known, I would have told you.
If I had known, I would have told you.
In third conditional if-clauses, use had + past participle, not would have.