连词成句
(1)
I, to, have, for,
lesson, the, before, prepare, I, class, have (.)(连词成句)
(2)
second, I, be, in,
back, will, a (.)(连词成句)
(3)
playing, hurt, when,
his, leg, he, he, basketball, was (.)(连词成句)
(4)
car, worry, don't,
your, about (.)(连词成句)
答案: I have to prepare for the lesson before I have class.
I will be back in a second.
He hurt his leg when he was playing basketball.
Don't worry about your car.