I did commented on your post.
Is this a correct sentence? As you know that we often make emphatic sentences by using "did"but when we make them we use 1st form but here 2nd form is used. I am just confused.
I did commented on your post.
Is this a correct sentence? As you know that we often make emphatic sentences by using "did"but when we make them we use 1st form but here 2nd form is used. I am just confused.
I did commented on your post.
The sentence is erroneous. You should write:
I did comment on your post.
The emphatic auxiliary do already expresses the past tense: did. The verb connected to do should be in the bare infinitive form, as Rathony has said.
Related questions:
P.S. One possible source of confusion for the learner is that we can use commented after the auxiliary have:
I have commented on your post.
This sentence is in the Present Perfect tense, and here the use of commented is correct.