第5行she always looks after some patients.（look加s)
倒数第6行I saw a yellow pants(see过去式saw)
倒数第7行There was a big sale.（is变was）
She asked me try them on (ask加ed)
My mother bought them for me(buy过去式bought)
I was very happy.I looked forword to your letter.（动词都变过去式）
3要我帮你写作文?