Must be and can’t be
If we are almost certain that something is true then we can use ‘must be’.
‘You came home late, you must be tired.’
‘You haven’t eaten since breakfast, you must be hungry.’
If we are almost certain that something is not true, then we use ‘can’t be’.
‘That ring is so cheap, it can’t be gold.’
‘That man looks exactly like my cousin Tom, but it can’t be. Tom is in Sydney.’
Make an example sentence using :
Must be
Can’t be
Photo by SimonQ錫濛譙 (Flickr:CC)