Can I use the verb ‘to do’ to emphasize the verb ‘can’?

The verb ‘to do’ can be used to emphasize things, e.g.: I do understand it.

Can it be used to emphasize a sentence that uses the verb ‘can’? E.g.: I do can play football.

If not, how could I achieve the above?

Answer

The matter is one of grammar. In the context you are talking about, do is acting as an auxiliary in the have does. The problem is the use of a double auxiliary. This can happen with the tense and voice auxiliaries, have and be, but not with ‘do’.

Even here there is an exception. Somerset dialect, now sadly moribund, permits

“I do go to the gym every Tuesday” or even

He do be looking for the way to the chemist.

But this is seldom heard today. It was educated out of children by the school system years ago.

So instead of I do can, you can can say I really can

Attribution
Source : Link , Question Author : Martel , Answer Author : Tuffy

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