when we can use badly?
I badly want ice cream? can say this? why we say badly instead very?

Question

Answer

'Badly' in this context means 'very much' in the sense of 'urgently'.

eg He badly needs a haircut  =  His hair looks terrible, and he really needs to get it cut as soon as possible.
      
Your sentence means 'I desperately want an ice cream'.

Answer

The word "badly" gives a sense of urgency so the person or people you're talking to will know that you really, really want to eat some ice cream. (.^_^.)/