我今天需要去医院挂号。
wǒ jīntiān xūyào qù yīyuàn guàhào 。
I need to register at the hospital today.
请先在前台挂号。
qǐngxiān zài qiántái guàhào 。
Please register at the front desk first.
他已经在网上挂号了。
tā yǐjīng zài wǎngshàng guàhào le 。
He has already registered online.