My guest arrived punctually.

我的客人准时到了。

Punctually at 7:45, the express to Kuala Lumpur left Singapore station.

开往吉隆坡的特快列车7：45准时从新加坡站驶出。

Punctually at nine o'clock the doctor arrived.

医生准时在九点钟到达。

They always pay punctually.

他们一向按时付款。

They managed to get there punctually.

他们设法准时到了那儿。