~ひょうしに(~拍子に)   => the moment [A], unintentionally / inadvertently caused something to happen N1
もらえまいか => Help... N2
Benefit
いくら…からといっても => no matter how ~ N3
Evaluate
いかにも…らしい => indeed; really; truly N3
Accept, agree
いくら~ても => no matter how ~ N3
いくら…といっても => no matter how ~ N3
Emphasize
いくらでも => no matter how much... N4
Emphasis on degree
いくらも…ない => there is only a few/ little… N3
More or less in quantity
..... ばかりもいられない => can't keep doing ~ N2
Speculation
~ ないともかぎらない => ~ It's unlikely... won't N1
Speculation
~てからというもの      => ever since ~ N1
てもらえないか => could you please ~ N3
Request