作文 – No.1
I am so tired that I can’t study.
I am too tired to study.
The box is so heavy that I can’t carry it.
The box is too heavy for me to carry.
He is so busy that he can’t play soccer.
He is too busy to play soccer.
The question was so difficult that we couldn’t answer it.
The question was too difficult for us to answer.
She was so surprised that she couldn’t speak.
She was too surprised to speak.