"Dad, this a real sword?" "Of course, it is a duel after all."
Take it seriously! The school festival won't wait for us. We're already in the final countdown.
She always has a serious look on her face.
He let go of her hands and his voice grew serious.
You need not have worried about her so seriously.
They gave serious attention to his words.
He tends to consider things too much earnestly.
He works slowly, because he takes things seriously.
He was in dead earnest when he threatened to call the police.
The only reason for the existence of a novel is that it does attempt to represent life.
When talking about his hobby, he always puts on a serious expression.
The president was very serious about your overseas assignment.
I studied really hard so as to pass the exam.
We talked seriously to one another.
I'm serious about my job.
I didn't consider the subject seriously.
As today's accident is very serious, I take it seriously.
If you study earnestly, you can expect to pass the exam.
Let's have a serious talk about your future.
We entered into a serious conversation.