is it necessary to tell his father everything?此句用is that necessary

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isitnecessarytotellhisfathereverything?此句用isthatnecessaryisitnecessarytotellhisfathereverything?此句用i

is it necessary to tell his father everything?此句用is that necessary
is it necessary to tell his father everything?此句用is that necessary

is it necessary to tell his father everything?此句用is that necessary
不可以 It is + 形容词+ (For sb) to do sth是
固定用法
意为 某人做什么事情是...样的

no,
only 'it' can be the subject in form.

不可以,这是固定句型
it is necessary to do

同意楼上意见

要记住整个句型:it is necessary to do (something)
不可换字