How can you say this sentence using past modal?

It’s a pity I didn’t start aerial yoga earlier.

• I must have started aerial yoga earlier.

• I should have started aerial yoga earlier.

• I can have started aerial yoga earlier.

• I could have started aerial yoga earlier.

How can you say this sentence using past modal?

It’s possible he has suffered a concussion.

• He may have suffered a concussion.

• He must have suffer a concussion.

• He should have suffered a concussion.

• He can have suffer a concussion.

How can you express this using past modal?

I’m sure he has gone to the doctor.

• He must have gone to the doctor.

• He ought to have gone to the doctor.

• He can have gone to the doctor.

• He should have go to the doctor.

How can you paraphrase this?

She managed to continue her work despite having a terrible migraine.

• She is able to continue her work despite having a terrible migraine.

• She was able to continue her work despite having a terrible migraine.

• She able to continue her work despite having a terrible migraine.

• She could to continue her work despite having a terrible migraine.

How to express this using past modal?

I’m sure Jim wasn’t at school yesterday. He was home sick.

• Jim can't have been at school yesterday. He was home sick.

• Jim must have been at school yesterday. He was home sick.

• Jim mustn't have been at school yesterday. He was home sick.

• Jim shouldn't have been at school yesterday. He was home sick.

How to express this using past modal?

Perhaps Judy went to the spa with a friend.

• Judy must went to the spa with a friend.

• Judy might have gone to the spa with a friend.

• Judy ought to went to the spa with a friend.

• Judy was able to go to the spa with a friend.

You have severe stomach pain. Your doctor looks concerned. What does he say?

• You mustn’t have an ulcer.

• You may have an ulcer.

• You will have an ulcer.

The dental technician asks you to follow her to the other room. What does she say?

• Could you follow me, please?

• Shall you follow me, please?

• Will you follow me, please?

You see a paramedic coming out of the building next door. What do you think?

• Someone must be sick or injured.

• Someone should be sick or injured.

• Someone can be sick or injured.

You have no free time because of your heavy extra-curricular activities. You are starting to regret it.

• I shouldn’t have taken on so many activities.

• I couldn’t have taken on so many activities.

• I wouldn’t have taken on so many activities.