Beginner Level Advanced Level
INTERMEDIATE LEVEL
Content
→ → →
like: It couldn → →
It couldn't be helped (= there was no way of avoiding it and we must accept it). ☊ sb can (not) help (doing) sth, sb can not help but do sth ☊
It couldn't have been me—it must have been someone else (= a different person). ☊ someone ☊