“All together” 是两个词，而 “altogether” 却是一个词 —— 它们的意思和用法相同吗？表示 “所有人或事物一起、一同” 的时候应该用哪一个？表示 “全然，完全” 的时候又该用哪个？
 
Hi, I'm Phil, and I'm going to tell you the difference between all together and altogether. Yes, they sound the same – but they're not.
All together – that’s two words and two 'l's – means everything or everyone being or doing something together with everything or everyone else.
Let's sing all together.
Or: Put the vegetables in the bowl and mix them all together.
Altogether – that's one word and one 'l' – is an adverb. And it means 'completely' or 'entirely'.
My brother has an altogether different personality to me – he's nothing like me!
So if you have altogether as one complete word, it means 'completely' or 'entirely'.
And if we have all together as two words together, then that means everything or everyone together.
 
用法总结
1 “All together” 由两个词组成，用来表示 “所有人或物一起、一同”。
Let's sing all together.
Put the vegetables in the bowl and mix them all together.
 
2  “Altogether” 是一个副词，用来表示 “完全，全然”。
My brother has an altogether different personality to me – he's nothing like me!