Subject + 拿起 + (了) + Object
拿起 (náqǐ) is a verb-complement compound meaning "to pick up" or "to take up." The directional complement 起 indicates an upward motion, showing that the object is being lifted from a surface.
他拿起桌上的手机看了一眼。
Tā ná qǐ zhuō shàng de shǒujī kàn le yī yǎn.
He picked up the phone from the table and glanced at it.
她拿起杯子喝了一口水。
Tā ná qǐ bēizi hē le yī kǒu shuǐ.
She picked up the cup and took a sip of water.
孩子拿起画笔开始画画。
Háizi ná qǐ huàbǐ kāishǐ huà huà.
The child picked up a paintbrush and started drawing.