What is inform command in Spanish 2? and please give me examples ​

I am going to assume you mean the "informal" command. These are tú commands. You would use these commands with friends, family, and informal peers (classmates, for example).

I added a table with columns for affirmative (do it) and negative (don't do it) commands.

Affirmative tú commands are formed by using the third person singular form of the conjugated regular verb. There are only eight irregular verb--see table.

Negative tú commands are formed by doing the following steps:

See table for irregular verbs -- They're color codedFor regular negative tú commands verbs, put the regular verb into the yo form, (i.e. hablo, como, escribo) [This captures stem changing verbs and other spelling changesRemove the -o/-oy (i.e. habl, com, escrib)Add "No" before the verb and add the "opposite" ending (i.e. hables, comas, escribas)

Explanation:

The above briefly explains how to form informal commands.

When do your brothers brush their teeth?

Ithink its b) built underground reservoirs