同义句转换Mary was here just now.And Alice was here,too.I got up

Mary was here just now.And Alice was here,too.
=Both Mary and Alice were here just now.
I got up too late.I was late for class this morning.
= I got up so late that I was late for class this morning.
Kate went home with Tina after school yesterday.
=Kate and Tina went home together after school yesterday.
合并句子
I had a computer ,I didn't know how to use it then.
-- I had a computer which I didn't know how to use then.(定语从句)

mary was here just now,so was alice
i was late for class this morning, because i got up too late.
kate and tina went to kate's after school yesterday

Both were

Both Mary and Alice were here just now.
I was late for class this morning because I got up too late.
I didn't know how to use my computer.

Both Mary and Alice were here just now.
Kate went home with Tina went home together after school yesterday.

Both Mary ang Alice were here just now.
I was late for class because(for) I got up too late this morning
I had a computer but I didn't know how to use it then.

Mary and Alice were here just now
I was late for class because I got up too late this morning