1. If you are just giving me a hard time, you won't be satisfied no matter how hard I try to please you.2. My manager keeps finding fault with me; I cannot take it anymore.
 Give somebody a hard time be difficult with somebody find fault with somebody being a jerk不要刁難他可以說 Give him a break. 就是指喜歡沒事找碴.
1. 如果你存心刁難我, 那不管我怎麼做都無法取悅你.2. 我老闆老挑我毛病, 我受不了了.
Being able to speak at the age of one, the boy has unlimitd potential when he grows up.