after adjectives which describe feelings/emotions (chappy,sad,glad,ect);express wilingess/unwillingness (willing,eager,reluctant ect);refer to a person's chracter(clever,kind ect)and the adjectives lucky and fortunate.lwas very sad to hear that carol had lost her job.Not:with adjectives that refer to character we can also use an impersonal construction.it was kind of you to help Andrea with her essay