0Because your sentence is01b 00n't,02b 00 plainly speaking, appropriate. 02br 00but if need be01i 00: but in case the 01b 00need02b 00 01b 00should/would 02b 00arise, or but in case01b 00 there should be a need02b 00 for, or (less good) in case it happens that the need exists/is created for 02i 0-
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Anonymousyou can say "If he be there" or "if he be worthy he shall ..."You can, but people might raise an eyebrow. The if ... be ... combination is from another era, long ago. It's extremely rare in modern English.
Anonymousmy questions is the same... why?It's not clear what you want to know. Why what?