How would you explain the difference between the words THIN and SKINNY?
Slim/thin/skinny have different meanings in terms of degree- if someone's underweight or losing weight through illness, you don't call them slim. Slim is positive, but skinny is negative in connotation. Which is thinner: thin or skinny?
We don't use 'I'll go to the cinema' when we have already made the plans or arrangements. We use it when, among other cases, we decide now:
'What do you want to drink'
'Uhhh... I'll have a white wine.'
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