Bonjour pouvez vous m'aider svp

transform these sentences and make the same hypotheses but using a modal auxiliary (may, must or can't)
1) Patrick'O Connor "is probably" an immigrant too.
2) I'm "nearly sure" he understood Shannon Ryan's situation.
3) "Maybe" Shannon Ryan found a job very easily.
4) Shannon Ryan "is certainly" very happy in America.
5) "I'm cetain" Shannon "never regrets" her decision to go to America