they don't have to study Russian.

Question

they don't have to study Russian.
They _______ ________ Russian.
我们可以看一下这个地方啊。。这个地方填 needn't 大家是否可以给我翻译一下这个don't have to 怎么翻译啊？谢谢啦。

Answer 1

dont' have to do = needn't do
所以填：needn.t study
have to do sth ≈ must do sth
但是两者有区别:
have to do 译为 ：不得不做某事 并且有时态之分
must do 译为 ：必须做某事 是一个情态动词，没有时态
本句译为：他们并不需要学俄语。

Answer 2

不必要。
have to do sth=need to do sth≈ must do sth
need to do是需要做某事
have to do 译为 ：不得不做某事 并且有时态之分
don't have to do sth 就是没必要做某事，与needn't do sth 意思相近。
must do 译为 ：必须做某事 是一个情态动词，没有时态
本句译为：他们并不需要学俄语

Answer 3

have to do sth 必须做某事
句子的意思是“他们没必要学习俄语”，needn't =don't have to