Is it necessary,do you think,that he __be kept__ informed of what is going on?要如何翻译呢?

It is necessary to do 的例句 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, No problem,Do you think it is necessary? it is necessary to do sth造几个句子~ It is not necessary to do this work```! Do you thing it is necessary for sencer to study__? 这英语对吗 it is necessary to do something = it is requisite to do something I think it is not necessary.还是I do not think it is necessary啊那一句对啊 do you think it necessary to do my homeworkDo you think it necessary to do my homework为什么不是Do you think it is necessary to do my homework I think it necessary to do sth.还是 I think it is necessary to do sth.如果是前者,为什么从句中不要be动词? 用it is important for sb to do the,it is different for sb to do sth,it is necessary for to do sth各造三个句子 Do you think it necessary for me to give him a letter 这句话为什么不用is不应该是it is necessary .还是有什么额外的规则? do you think it is necessary to pass CET4?states your reasons it is necessary to finish __(do)your homework on time 翻译 大量阅读是必要的（it is necessary to do sth) ____________________________ It is necessary for to do first aid when we _____ someone injured in an accidentJia do you think it is necessary to have rules at schllo?why? if it is necessary /if necessary /when it is necessary 意思一样吗