I do You do He/She/It does We do You do They do I am You are He/She/It is We are You are They are

The most common use for "to be" (is, are, etc.) as an auxiliary verb is in the progressive tenses, also known as continuous tenses, which use the "ing" ending on the main verb. There are other less significant uses, but these are the major ones you should learn as thoroughly as possible! :) THE VERB "TO DO" AS AUXILIARY PRESENT PROGRESSIVE Every year, it snows. It IS snowING now. PAST PROGRESSIVE When I was a child, I played soccer. I WAS playING soccer when I broke my ankle. THE VERB "TO DO" AS AUXILIARY The most common use of the verb "to do" an an auxiliary verb is to 1. form a QUESTION with the main verb 2. make the NEGATIVE form of the main verb ("did not") I play golf. DO you PLAY golf? She worked all night. DID she WORK all night? The dog ate its dinner. The dog DID not EAT its dinner. Notice: when using "to do" in forming a question or a negative, we use the infinitive form of the main verb, but without the word "to." Notice: there is no "ing" ending when using the verb "to do" as the auxiliary verb Notice: when speaking in past, only the auxiliary verb is given in the past tense. WRONG: Did the dog ate its dinner? RIGHT: Did the dog EAT its dinner?

I will do it. It does not work anymore. They do not need me now. She does it all. There are seven buses leaving tomorrow. How many are there? They are very tall. It is hot outside. It is 4:30 p.m. Is it ready? It is five feet long.