If both auxiliary verb and main verb come in a sentence, where is the adverb of frequency/degree generally put?
The correct option is A Between auxiliary verb and main verb
When a sentence contains more than one verb i.e. one main verb and another is an auxiliary verb, place the adverb of frequency/degree between the verbs. E.g. They have often visited Europe. Here, 'have' is an auxiliary verb and 'visited' is the main verb so, 'often' is placed between the two. Thus, option A is the correct answer.