几道八年级英语题，帮忙解决一下啊！

Question

句型转换：The boy is the tallest of the three.(改为同义句）
The boy is_____ ______the ______two.
单句改错：Do you must study computer? ---Yes,I do.
(哪个词用错了？）
请仔细地讲解一下！

Answer 1

1.The boy is taller than the other two.
解答原因:The boy is the tallest of the three.的意思为:这个男生是三个中最高的.The boy is taller than the other two.的意思为:这个男生比另外两个男生高.
2.must改为have to
解答原因:因为must为一定,自愿的,have to为不得不,不是自愿的.
must是情态动词不能和助动词连用

Answer 2

taller than other
must---have to

Answer 3

taller than other，must——have to must是情态动词不能和助动词连用