不一定会英文

not neccessarilynot for sure/certaindon't count on it

not necessarily maybe not always It Depends 都是的~可以根据句子的结构选择最合适的

He does not come

Not necessarily或者necessarily都行，还是not necessarily比较准确点儿。呵呵！

uncertaintymaybe not benot necessarily例：Every rascal is not a thief,but a thief be a rascal.每个无赖不一定是盗贼;每个盗贼必定是无赖。Let's eat now and maybe we could catch a movie later. 咱们现在就吃,说不定吃完能赶场电影.Clouds do not necessarily forecast rain.云层未必预示下雨。

会的。说成：I can't use the phone.

i think he will not come.额外想告诉你，你可以下载金山词霸软件。希望能帮到你，呵呵

not sure~