1.
Correct
: we can do it in your house.
Incorrect : a.
We can to do it in your house.
b. we can does it in your house.
c. we can did it in your house.
2. correct :
they could do it yesterday.
Incorrect : a. They could to do it yesterday.
b. They could does it yesterday.
c. They could did it yesterday .
3. correct : You
had better do it immediately.
Incorrect : a. You had better to do it immediately.
b. You had better does it immediately.
c. You had better did it immediately.
4. correct : She
may do it now.
Incorrect :
a. She may to do it now.
b. She may does it now.
c. She may did it now.
5. correct : He
might do it today.
Incorrect :
a. He might to do it today.
b. He might does it today.
c. He might did it today.
6. correct : You
must do it right now.
Incorrect : a. You must to do it
right now.
b. You must does it right now.
c. You must did it right now.
7. correct :
They ought to do it as soon as possible.
Incorrect : a. They ought to to do it as soon as possible.
b. They ought to does it as soon as possible.
c. They ought to did it as soon as possible.
8. correct : We
shall do it tonight.
Incorrect : a. We shall to do it tonight.
b. We shall does it tonight.
c. We shall did it tonight.
9. correct : You
should do it well.
Incorrect : a. You should to do it well.
b. You should does it well.
c. You should did it well.
10. correct : I will do it the best as I can do.
Incorrect
: a. I will to do it the best as I can do.
b. I will does it the best as I can do.
c.
I will did it the best as I can do.
11. correct : I would do it as good as them. (formal)
Incorrect :
a. I would to do it as good as them.
b.
I would does it as good as them.
c.
I would did it as good as them.
So :
formal modal : Would, Could, May, Had better, Ought to
informal modal : Will, Can, Might, Should, Shall, must
