please explain to me why we say this
please explain to me why we say this
I heard a lot of people said like this
my mother and I
my friend and I
......ect
why we don't say
I'm, like
my friend and I'm

Question

please explain to me why we say this
please explain to me why we say this
I heard a lot of people said like this
my mother and I
my friend and I
......ect
why we don't say 
I'm, like
my friend and I'm

Answer

Because I  (singular) corresponds with am (singular).

I and "my friend"   is a plural.  For example, we would not write or say   "We am."
 but "We are."

"my mother and I"     refers to a "we"   (plural)    [See Noun/Verb Agreement]