(1) What are you frowning at me for?
(2) She frowned with concentration.
(3) In her family, any expression of feeling was frowned upon.

(1) He is motivated entirely by self-interest.
(2) She's very good at motivating her students.
(3) The plan is designed to motivate employees to work more efficiently.

(1) [可数名词, 不可数名词]an evaluation of the health care system
(2) We need to evaluate how well the policy is working.
(3) Our research attempts to evaluate the effectiveness of the different drugs.