用作定语
▲～+n.
Mathematics requires logical thinking.数学需要逻辑思维。
When very angry, people seldom act in a logical way.人在盛怒时,很少有理智的行为。
It seemed the only logical thing to do.看来，那样做才合乎常理。
用作表语
▲S+be+～
To be specific, the argument in your graduation thesis is logical.具体地说,你的毕业论文符合逻辑。
▲It is/was+～+to-v
It is logical to assume that they will attend.认为他们会出席是符合道理的。
▲It is/was+～+that-clause
It is logical that the book is expensive.书贵是很自然的事。
