1. 请在五点半叫醒我。

[ qǐng zài wǔ diǎn bàn jiào xǐng wǒ 。 ]

Wake me up at five thirty.

2. 他大概只有五英尺高。

[ tā dà gài zhǐ yǒu wǔ yīng chǐ gāo 。 ]

He is only about five feet high.