by all means可以單獨使用。
這個短語的意思有兩層:
一是表示“一定”、“無論如何”、“用一切手段”
二是用於回答,表示有禮貌的同意,作“好的”、“當然可以”解。
例如:
you must bring him here by all means.你們一定要設法把他帶到這裡來。
This project must be realized by all means.這個規劃必須要實現。
You should by all means warn him before he leaves for singapore.你務必在他去新加坡之前提醒他。
May i have one—yes,by all means.我可以拿一個嗎——當然可以。