Obligation, presmission and possibility 2

We're allowed to dress down on Fridays.

• We can dress down on Fridays.

• We need to dress down on Fridays.

• We could dress down on Fridays.

It isn't necessary to wear a tie.

• You can't wear a tie.

• You mustn't wear a tie.

• You don't have to wear a tie.

A few years ago, employees weren't allowed to check personal emails at work.

• A few years ago, employees mustn't check personal emails at work.

• A few years ago, employees couldn't check personal emails at work.

• A few years ago, employees can't check personal emails at work.

You aren't allowed to eat sandwiches at your work station.

• You couldn't eat sandwiches at your work station.

• You can't eat sandwiches at your work station.

• You mustn't eat sandwiches at your work station.

In the past, it was obligatory for employees to sign out every time they left the building.

• In the past, employees could sign out every time they left the building.

• In the past, employees can sign out every time they left the building.

• In the past, employees had to sign out every time they left the building.

It is necessary to book holidays six months in advance.

• You need to book holidays six months in advance.

• You can book holidays six months in advance.

• You had to book holidays six months in advance.

It is obligatory to switch off your mobile phone at work.

• You could switch off your mobile phone at work.

• You must switch off your mobile phone at work.

• You don't have to switch off your mobile phone at work.

From the start of next month, it is permitted to start work between 8 and 10 a.m.

• From the start of next month, we need to start work between 8 and 10 a.m.

• From the start of next month,we can't start work between 8 and 10 a.m.

• From the start of next month,we are able to start work between 8 and 10 a.m.