Simple Present Tense

I sing
How do we make the Simple Present Tense?
subject + auxiliary verb + main verb
do base
There are three important exceptions:
For positive sentences, we do not normally use the auxiliary.
For the 3rd person singular (he, she, it), we add s to the main verb or es to the auxiliary.
For the verb to be, we do not use an auxiliary, even for questions and negatives.
Look at these