"tap at" in Chinese (Simplified)
轻敲
Definition
用手指等轻轻敲击某物，通常是为了引起注意或确认有人在。
Usage Notes (Chinese (Simplified))
常与“门”、“窗”等搭配，表示动作轻柔多次，不等同于用力敲。比“knock”更正式或描述性。也可引申为吸引注意。
Examples
She tapped at the door, hoping someone would answer.
她**轻敲**门，希望有人会回应。
Please tap at the window if you arrive early.
如果你早到，请**轻敲**窗户。
A bird tapped at the glass, trying to get inside.
一只鸟**轻敲**玻璃，试图进来。
He kept tapping at his phone screen until it finally unlocked.
他不断**轻敲**手机屏幕，直到终于解锁。
Someone tapped at my shoulder to get my attention in the crowd.
有人在人群中**轻轻拍了拍**我的肩膀引起我的注意。
She tapped at the keyboard nervously before the presentation started.
她在演讲开始前紧张地**轻敲**键盘。