Present obligation/prohibition/advice
You ______________ pay online, I think it's safer.
SHOULD / OUGHT TO / HAD BETTER
We still had some bread, so you ___________________(buy) more.
NEEDN'T HAVE BOUGHT
To talk about OBLIGATION/PROHIBITION/ADVICE how can we put NEEDN'T / SHOULD / OUGHT TO in the past?
NEEDN'T / SHOULD / OUGHT TO + HAVE + V3
People buy lottery tickets in the hope that they ______________ win.
MIGHT / MAY / COULD
James _______________(buy) a new car. He's just been fired.
CAN'T HAVE BOUGHT
You ___________________ be 20 years old to drive.
DON'T HAVE TO / DON'T NEED TO / NEEDN'T
It was an open event, so you _____________________(go) if you didn't want to.
DIDN'T NEED / DIDN'T HAVE TO
To talk about SPECULATIONS in the past we use CAN'T HAVE when we are almost sure that something happened. True or false?
FALSE. Use CAN'T when you are almost sure that something DIDN'T happen.
Louisa thinks she ________________ get promoted, but she's not sure.
MIGHT / MAY / COULD
You didn't leave your house today, so you _______________(leave) the bag there.
MUST HAVE LEFT
If you don't have a credit card you _________________ have cash.
MUST / HAVE TO / NEED TO
I think we _________________(go) to another restaurant.
SHOULD / OUGHT TO HAVE GONE
To talk about OBLIGATION/PROHIBITION/ADVICE can we use MUST in the past?
No, we can't. OBLIGATION in the past: HAD TO / NEEDED TO
She only gets paid next week, so I think she _________________ lend you money.
CAN'T
Salt ___________________(be) very important in the past, it was often taxed.
MUST HAVE BEEN
To open a bank account you _______________ use somebody else's ID.
MUSTN'T / CAN'T
They ___________________(be allowed) to go to the concert, and they were very happy!
WERE ALLOWED
We use DIDN'T NEED TO to talk about something that happened but it wasn't necessary. True or false?
FALSE. To talk about something that happened but it wasn't necessary we use NEEDN'T HAVE
Sam _________________ have a lot of money. He buys new cars every year.
MUST
The dog _________________(burry) his bone here, but nobody has found it yet.
MIGHT / MAY HAVE BURRIED