原级是close，例如：
1、Close your eyes and imagine you are in a forest.闭上眼睛，设想自己在森林里。
2、I closed my eyes against the bright light.我闭上眼睛以防强光的照射。
3、He closed his eyes wearily.他疲惫地闭上了眼睛。
4、The meeting was drawing to a close.会议快结束了。
