Understanding how to use 多 properly My grammar could be wrong, but it feels like in Cantonese you would typically say something like 食多啲 to mean eat more.

But this Mandarin grammar page says you should usually put 多 before the verb, not after:


  In English we like to say things like "eat more" and "drink more beer"
  and "I need to exercise more." Notice that in every one of these
  cases, the word "more" (equivalent to this use of 多) comes after the
  verb in English. In Chinese, it's more natural to put the 多 before the
  verb.


1) Is my Cantonese grammar wrong?

2) If not, does this mean Cantonese grammar and Mandarin grammar differ regarding 多?
Actually, 多(more) functions the same in both Cantonese and Mandarin  

Example:

"Eat fish more often "= "多吃鱼" (Mandarin) = "多食鱼" (Cantonese)

~

The Cantonese term "多啲"(more) is equal to "多些"(more) in Mandarin. It can be placed before or after the verb. 

For example: 

(Mandarin)


多些吃鱼 = eat fish more often
吃多些鱼 = eat more fish


(Cantonese)


多啲食鱼 = eat fish more often
食多啲鱼 = eat more fish


(The real difference between Cantonese and Mandarin here are '食' vs.'吃' ; '多啲' vs. '多些')