考研英语中关于“回报”的英语表达有多个，可以根据不同的语境选择合适的词汇。以下是一些常见的表达：
return
词性：名词或动词
释义：返回、归还、回报、答复
例句：
She returned the book to the library.
I will give you a return for your kindness.
reciprocate
词性：动词
释义：回报、互惠、互换
例句：
They reciprocated our kindness with a gift.
The two countries have been reciprocating each other's visits.
payback
词性：名词或动词
释义：偿还、报复、回报
例句：
He waited for his payback after years of hard work.
She decided to pay back her friend for her support.
dividend
词性：名词
释义：红利、回报、分配
例句：
The company announced a dividend for its shareholders.
The dividend was paid out to all eligible shareholders.
render
词性：动词
释义：给予、提供、回报、呈现
例句：
She rendered assistance to her colleague during the project.
The artist rendered the scene in a realistic style.
根据具体的语境和需要表达的含义，可以选择合适的词汇来表达“回报”的概念。例如，在描述对某人的帮助或支持时，可以使用“render”或“reciprocate”；在谈论投资回报时，可以使用“dividend”或“return”。