Subject + 抬头
抬头 (táitóu) means "to raise one's head" or "to look up." It is a verb-object compound describing the physical action of lifting the head. For example, 先生抬头 means "the gentleman looked up."
听到有人叫他,他抬头看了一眼。
Tīng dào yǒu rén jiào tā, tā táitóu kàn le yī yǎn.
Hearing someone call his name, he looked up.
她一直低着头写字,都不抬头。
Tā yīzhí dī zhe tóu xiězì, dōu bù táitóu.
She kept her head down writing the whole time without looking up.
老师走进来的时候,学生们纷纷抬头。
Lǎoshī zǒu jìnlái de shíhòu, xuéshēngmen fēnfēn táitóu.
When the teacher walked in, the students all looked up.