1,He failed the exam because he didn't study hard
=>Had...................................................
2,He never intented to meet her
=>He never had............................................
3,"Can you help me do this work?"He asked his girlfriend
=>He asked his girlfriend.................................................................
1,He failed the exam because he didn't study hard
=>Had he studied hard, she wouldn't have failed the exam.
2,He never intented to meet her
=>He never had intention of going to the meeting
3,"Can you help me do this work?"He asked his girlfriend
=>He asked his girlfriend to help him do that work.