I am learning how 'To do'" verbs work in a sentence. I also understand they emphasize what main verbs are doing in a sentence. - I stumbled on a quiz question that says Sam did do the dishes. When I chose did and do for my answer, I was wrong. The correct answer was "do". Does anyone know why that is the case? - I have learned there are 3 types of to do verbs: do, does, and did (unless there are more types of to do verbs I am unaware of.)
Can you link to the quiz question, because what you're asking isn't making a lot of sense. At least not to me.
https://www.writingforums.org/resources/english-grammar-101.152/ He's doing the lesson 'Helping verbs.'
I think you're misunderstanding the scoring system. You were supposed to click on both "did" and "do". When I click on both of them, it scores me as a correct answer.
The grammar lesson's really problematic on so many levels... I would not try to learn English grammar through that particular site. I think it'd mislead you more than help. "should have been", for example, should always come together - it makes no sense to ask a student to single out "should have" but not to select "been", for example. The term "helping verb" is also confusing. Just call it a damn auxiliary verb, which is the official term. Things like "should have been" and "might have been" etc I believe are called the Modal Perfect. It makes no sense to call it a single "helping verb".
