怪しがる

(1)place in doubt or express doubtful speculation; "I wonder whether this was the right thing to do"; "she wondered whether it would snow tonight"

(2)疑う、または疑わしいという推測を表明する

(3)consider unlikely or have doubts about; "I doubt that she will accept his proposal of marriage"

(4)ありそうもないと思うか、疑いがある

(1)I doubt that she will accept his proposal of marriage

(2)私は、彼女が彼の結婚の申し込みを受け入れるのを疑問に思っている