接続詞that – No.1
I think (that) this book is interesting.
He knows (that) she is very kind.
Do you know (that) he is a doctor?
I don’t think (that) he can swim.
(I think [that] he can’t swim.)
I think (that) he is a teacher.
He knew (that) his brother was busy.
I think (that) this flower is beautiful.
Do you know (that) he is a student?
I don’t think (that) she can speak English.
(I think [that] she can’t speak English.)
I know (that) she can use a computer.