need the most 一番必要 は when などと一緒に使われる。公式的には when someone needs something (the) most. のようになる。
6:52 perhaps it was a chip in his shoulder that made Lyles run so well at this year's championships or perhaps it was just the perfect combination of mature training finally paying off when he needed it the most. ライルズの負けん気が彼を快走させたのか、それとも日ごろのトレーニングの賜物が、ここ一番と言う時に、功を奏したのか。
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0:21 and just when we need them the most, coupons are becoming harder to find. クーポンは一番必要な時にお目にかかれなくなっている。
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0:50 'cause you left me when I needed you most. 君を一番必要としていた時に、君は去って行った。
Randy VanWarmer - Just When I Needed You Most (Stereo)