Using the correct form of be and have in the present tense
7a. I was interested in working on the presidential campaign if the opportunity still exists.
7b. I am interested in working on the presidential campaign if the opportunity still exists.
my answer is: 7b
Right. :-)
Correct! The sentence "I am interested in working on the presidential campaign if the opportunity still exists" is in the present tense and uses the correct forms of the verb "be" (am) and "have" (exists).
To determine the correct form of the verb "be" in the present tense, you need to use "am" when the subject of the sentence is the first person singular (I). In this case, the subject is "I," so "am" is the correct form of "be" to use.
To determine the correct form of the verb "have" in the present tense, you need to use "exists" when the subject of the sentence is a singular noun or a third-person singular pronoun (such as he, she, it). In this sentence, the subject is "the opportunity," which is a singular noun, so "exists" is the correct form of "have" to use.
Therefore, your answer of 7b is correct. Well done!