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必ず， かならず
1. always, without exception, necessarily, certainly, without fail, positively, invariably
必须，必定
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伺う， うかがう
1. to call on someone, to call at a place, to pay a visit, to wait on someone
2. to ask, to inquire
3. to hear, to be told
4. to implore (a god for an oracle), to seek direction (from your superior)
5. to speak to (a large crowd at a theatre, etc.)
听到；被告知；拜访某人；前往某地拜访；去某地探望；为某人服务；询问；打听；祈求(神明赐予神谕)，向(上级)寻求指引；向(剧院等场所内的众多观众)讲话