Be on a diet is hard.
Being on a diet is hard.I want to say that usually, for most people, doing a thing is very difficult. I want to say this is always true, a fact.
Which form do I have to use, be or being? And why?
Answer
The gerund is fine, but I cannot think of a case in which a ‘bare infinitive’ may be used as a nominal. As a rule you must use the ‘marked infinitive’: the infinitive preceded by to. So these are OK:
To be on a diet is hard.
Being on a diet is hard. … and as Matt says, this is more common than the infinitive
But this is not:
✲Be on a diet is hard.
✲ marks an utterance as unacceptable
Attribution
Source : Link , Question Author : chiaraluna , Answer Author : StoneyB on hiatus