I'll try, but sometimes it's hard to determine the correctness of a sentance when the intended meaning is somewhat obscure: 1)The resolute constantly keep resolutions, while the irresolute constantly resolve. Although I would probably replace constantly with consistently in the first clause. In your wording, the first clause means that the resolute keep resolutions that are constant, which doesn't make sense to me -- what is a constant resolution?
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Many companies came help, luckily.
My question is about the kind of group preposition at the end, is it a group preposition, because I am uncertain that word works at the end.