Question

2- change to past tense.
a)Is your mom here?
b) you aren't alone.
c) David isn't my brother.
d) Am I sad?

Answer 1

A) Was your mom here?
B) You weren't alone
C) David wasn't my brother
D) Was I sad?

Os verbos to be "am, is, are" sofre uma mudança quando passa para o passado.
Am - was I am intelligent - I was intelligent
Is - was He is beautiful - He was beautiful
Are - were we are a team - We were a team

Negative form:
Was - was not - wasn't
Were - were not - weren't