1. I must read Richard III before my course begins. (Change it to past.)

2. I have to take the pills three times a day. (Change it to past.)

3. They must be away on holiday. (Change it to past.)

4. We can’t have a lunch break - there’s too much to do!

5. He can’t be a millionaire. (Change it to past.)

6. We mustn’t shout in the classroom. (Change it to past.)

He won’t go to bed. (Change it to past.)

That will be the postman at the door. (Change it to past.)

9. You should be more careful. (Change it to past.)

10. He could help with the washing-up for a change. (Change it to past.)

11. You must have seen him at the party. I know he was there.

12. The dog is really dirty. He might have been swimming in the pond.

13. He can’t have been telling the truth.

14. He might have left a voicemail on your phone.

15. They must have been very upset when you told her the news.

16. Ian will be back soon. It’s Friday, so he’ll have gone to the pub for a quick drink after work.

17. Stella’s wearing a beautiful diamond ring.

18. The children ran away laughing and giggling.

There’s flour on Grandma’s nose.

Paolo and Geri said they’d wait for me, but I can’t see them.

Tim’s flat is such a mess.

It’s after midnight. Henry and Sally left ages ago.

I don’t know why Tara didn’t ring back.

Look at Joe’s hair. It’s really long!

A tree has fallen across the road.

My white jeans have turned pink.

My TV has broken and I’ve only just had it fixed.

David’s suit looks a bit dirty.

The car windscreen has shattered.

What's happened to the cake?

He .....(could/use) the fire escape or he......(might/ climb) that tree.

Well, he...... (need not/ bother). There wasn’t anything worth stealing!

Bill told me that he’d spent £2,000 on a birthday present for his girlfriend, but he......... (must/joke). Surely he......... (could not/spend) that much?

I think you6(might/ mishear) him!

It’s 3.30. Mum and Dad’s plane landed over an hour ago. They......... (should/ phone) by now!

But they.........(may/be delayed). No, look! They’re driving up now. You .........(need not/worry).

You’re very sunburnt. You........(would not/get) burnt if you’d used factor 30 sunscreen.

I ......... (must/fall) asleep. And I............(can’t/put on) enough cream. Ouch!

She................ (could never/ imagine) how important it would become for her.

She.........(need not/worry)-, the weather had changed, and skiing conditions ............(could not/be) better - clear blue sky and half a metre of fresh snow.

She joined some snowboarding friends and Rhianna suggested going off-piste, to an area where she knew lots of fresh powder snow ____________________________(would/ fall).

She now knows she............................(should/be).

That normally .........(would not/be) much of a problem, but Rhianna continued to fall, and felt snow rushing past her. She thought it ...............(must/cause) by the snowboarder behind her, but in fact they'd started an avalanche, which carried her for 150 metres.

She thought her friends.....................(might/try) to call her - in fact they assumed she ......................(must/ski) on alone and was probably waiting for them round the comer.

she ......(could/survive). She had no pulse, but after being given the kiss of life, she recovered. She was flown to hospital, where doctors worried she ......(may/suffer) brain damage.

In fact, although she .........(should not/go) skiing wearing only light clothing, this is what saved her - her body temperature had dropped so low, it reduced her brain's need for oxygen.

Rhianna knows she was very lucky and ........ (could easily/die), and that she really ......... (should/check) the avalanche risk. She certainly does now, whenever she goes off-piste!

A: I’m sorry. I ...... Tom what you said about him.

B: It s too late! He’ll never speak to me again!

A: Where’s the dog?

B: I don’t know. Dad......... him for a walk.

A: No. Now I remember. It’s Tuesday, isn’t it? Mum ......... him to the vet.

A: Are Pat and Jan definitely coming? I........... they’d be here by now.

B: They ........... by traffic.

Or they .......... an accident!

B Don’t be silly. Anyway, we ......... by now if something like that had happened.

A: Who was that man?

B: He .......... a friend of Jane’s. He was asking if I’d seen her.

A:  I’m starving. I think I ......... myself a sandwich.

B: It’s only nine o’clock! You...... eaten enough for breakfast.

A: Helen ......... be at work by now. I wonder where she is.

B: Check your phone. She ......... messaged you to let you know she was going to be late.