it is necessary .it is necessary for them to learn the language in order to communicate with these people and to learn from them

if it is necessary /if necessary /when it is necessary 意思一样吗 when it is necessary 为什么可以变为when necessary? it is necessary for you to work Is it necessary to learn grammer It is necessary for sb to early 是什么副词It is certainly necessary! It is necessary to do 的例句 i feel it necessary 的句子成分分析下为啥不是 it is necessary 关于necessary.it is necessary to do sth.it is nec关于necessary. it is necessary to do sth. it is necessary to doing sth. 两者有什么区别?什么时候用to do .什么时候用 to doing?请回答, Change is not necessary to life,it is life it is clear that sleeping is necessary to everyone it's necessary是什么意思 We consider _________the instrument be adjusted each time it is used.选项:a、that it necessaryb、it necessary thatc、 necessary thatd、necessary of it that More and more people think it necessary to let .为什么这里只用it,而不是it is necessary to . we consider____the machine should be adjusted each time it is usedA.that it necessary B.necessary it that we think that is necessary还是we think that it is necessary is it necessary to tell his father everything?此句用is that necessary It is necessary to protect trees from the frost.翻译