The Simple Present

To form the simple present verb in the 3rd person singular you usually add only an ~s to the end of the verb.

drink-drinks run-runs see-sees snow-snows

dream-dreams rub-rubs sleep-sleeps write-writes

There are, however, many exceptions to the normal spell rule for forming the 3rd person singular verb.

If a verb ends in the letters ~sh, ~ch, ~ss, or ~x the 3rd person singular verb is formed by adding ~es to the end of the verb.

push-pushes teach-teaches kiss-kisses fix-fixes

If the verb ends with a consonant + ~y, change the ~y to ~i and add ~es to form the 3rd person singular verb.

cry-cries study-studies

If the verb ends in a vowel + ~y, add ~s to the verb to form the 3rd person singular verb.

pay-pays buy-buys

The verbs have, go, and do are irregular verbs.

have-has go-goes do-does