by mistake

I was aiming at the tree but hit the car by mistake.(我对准树射击，不料误中了汽车。)

Someone took my hat by mistake.(有人错拿了我的帽子。)

I took his umbrella by mistake.(我错拿了他的雨伞。)

She put salt into her coffee by mistake.(她误把盐放到咖啡里去了。)

He took my pen by mistake.(他错拿了我的钢笔。)

Maybe he took yours by mistake.(也许他错拿了你的。)

She greeted the man by mistake.(她错跟那个人打了招呼。)

I did it by mistake.(我误做了这事。)

I brought other baggage by mistake.(我拿错了别人的行李。)

So sorry, I took your school T-shirt by mistake.(很抱歉，我误拿了你的校服。)