Hi, yes, the "to" is usually left out in those constructions. It seems the verb "to do" plays an important role: The fist thing to do is check the tank. What you have to do is try not to despair.
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KooyeenHi,
yes, the "to" is usually left out in those constructions. It seems the verb "to do" plays an important role:
The fist thing to do is check the tank.
What you have to do is try not to despair.
What you should do is try to remain calm and try to rest as much as possible.