SUBJECT + to be + VERB (INFINITIVE)-ing + COMPLEMENT

to be conjugation:

I am

You are

He/she/It  is

We are

They are

 SUBJECT + DO NOT (DON'T)/DOES NOT/DOESN'T) VERB (INFINITIVE) + COMPLEMENT

note: With the auxiliar do/does, you don´t need to add a s/es ending

  DO /DOES + SUBJECT + VERB (INFINITIVE) + COMPLEMENT+?

note: With the auxiliar do/does, you don´t need to add a s/es ending

• If the verb ends in a consonant + y, change the y to i and add es. Example: "He studies."
• If the verb ends in -o, -s, -ss, -sh, -ch, or -x, add es. Example: "She watches."
• For all other verbs, simply add s. Example: "It runs."