Please close the back door before you leave the classroom.
離開教室前請把後門關上。
My brother and I always sit in the back seat of my dad's car.
我和弟弟總是坐爸爸車子的後座。
The teacher asked the tall students to sit in the back row.
老師請高個子的學生坐在後排。
We planted some tomatoes in our back garden last weekend.
我們上週末在後花園種了一些番茄。