Question

1- I don’t feel weel. I _____ have to see a doctor. *

a) might

b) might be

Answer 1

a) might.

In order to maintan the meaning of the expression above, the correct expression should be "might", because there is another verb "have" to complemente the main verbe "might".

So, you can´t use "might be", because it is not possible to put two infinitive verbs together, so the rightt resolution would be the use of the verb "might", in order to put the right meaning, generaally in this situation.