Hello my dear students.
As AULES is not operational yet, and it is expected to be like that for a while, here I bring you some sentences which you have to rephrase.
Remember that you have to keep the original meaning, but in this case you have to put into practise the grammar that we are dealing with in this unit, modal verbs and modal perfects.
➔Example:
It’s possible that Jane will visit Switzerland next year.
Jane may /might / could visit Switzerland next year.
Send your solutions in a comment
clicking on this link indicating your name, so I can reply it.
The solutions with some explanations will be published next Monday before 10am on this same post.
Modals 1
Re-write
the sentences so that they have the same meaning as the original. You must use
a modal verb.
1- I'm
sure John locked the office before leaving. He always does.
John must have locked the office before leaving.
A modal perfect is needed here,as this sentence is referring to the past (locked). It expresses positive certainty. Positive certainty in the past = MUST HAVE
2- If
I were you I would tell him the truth.
You should tell him the truth.
You ought to tell him the truth.
You'd better tell him the truth.
Recommendation / advice in the present. These are the three forms that are used to express that meaning.
3- It
isn't necessary for her to phone me back.
She needn't phone me back.
She doesn't have to phone me back.
She doesn't need to phone me back.
Lack of necessity in the present. These are the three forms you can use to express that meaning.
4- Ann
finished the project on her own although it wasn't necessary to do so.
Ann needn't have finished the project on her own.
Again, lack of necessity, but this time in the past. That's why we use here the modal perfect form. In this case , Ann did the thing, but there was not a real need.
5- It
was a mistake to sell the house. I wish I hadn't.
I shouldn't have sold the house.
Regret. These meanings always refer to the past, so we use a modal perfect form = SHOULD (NOT) HAVE
6- Perhaps
we'll go swimming tomorrow.
We may go swimming tomorrow.
We might go swimming tomorrow.
We could go swimming tomorrow.
Possibility / Probability in the present / future. We can use three different modals for this meaning without changes in the meaning: may / might / could.
7- I
think Mary is probably at home because the windows are open.
Mary must be at home because the windows are open.
Positive certainty in the present. We have some evidence which indicates that something is true (the windows are open). For this meaning, we use MUST.
8- Perhaps
John knew about the trip, but I'm not sure.
John might have known about the trip.
John may have known about the trip.
John could have known about the trip
Possibility / probability in the past. Modal perfect form required here = MAY / MIGHT / COULD HAVE
9- I'm
sure he didn't lock the door. He never does.
He can't have locked the door.
Negative certainty in the past. Modal perfect form required here. We are sure that something did not happen = CAN'T HAVE
10-Perhaps
she was at work when the earthquake struck.
She may have been at work when the earthquake struck.
She could have been at work when the earthquake struck.
She might have been at work when the earthquake struck.
Possibility / probability in the past. Modal perfect form required here = MAY / MIGHT / COULD HAVE
