英语中第三人称的意义都有哪些?列举出来,怎样运用到句子中去?如在have与has,do中？

第三人称单数,如he,she
,it,your
father,Andy等
应该用has
,does
He
has
a
rubber.
She
does
her
homework.
第三人称复数,如they,his
friends,my
brothers等应用have,do
They
have
too
many
books.
My
brothers
do
well
in
Maths.