Subject + 互相 + Verb
互相 (hùxiāng) is an adverb meaning "mutually," "each other," or "one another," placed before a verb to indicate that an action is reciprocal between two or more parties. Both parties perform the same action toward each other.
好朋友之间应该互相信任。
Hǎo péngyǒu zhījiān yīnggāi hùxiāng xìnrèn.
Good friends should trust each other.
同事们互相帮助,工作效率提高了很多。
Tóngshìmen hùxiāng bāngzhù, gōngzuò xiàolǜ tígāole hěnduō.
The colleagues helped each other, and work efficiency improved greatly.
他们俩互相看了一眼,都笑了。
Tāmen liǎ hùxiāng kànle yī yǎn, dōu xiàole.
The two of them glanced at each other and both laughed.