close, shut这两个词的共同意思是“关闭”。其细微区别在于:

close指把门等关到让人不能出入的程度，只表示关上;

shut指关严并紧紧闩住，强调与外界隔绝。

He did not close the door when he left the room.

他离开房间时没有关门。

Shut the door so that the cat won't get out.

把门关严，别让猫跑出去。

She shut herself in her bedroom sobbing her heart out.

她把自己关在卧室里,哭得死去活来。