It is very necessary to speak english aloud的同义句是?

It is very necessary to speak english aloud的同义句是? 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 getting enough sleep is necessary 改为同义句-------- very necessary --------- -------- enough sleep if you want to find a good job ,it is necessary for you to study hard.of course,a goodc--------is also very important 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, 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 Change is not necessary to life,it is life it is clear that sleeping is necessary to everyone 关于it 做形式主语句子的几个问题（1）为什么有的时候是It be necessary for sb to do sth.有时候却用It be necessary of sb to do sth.差别在哪里?比如：It is very difficult for me to do it.和It was very kind of him to pa It is very hot