Question

Fill in the blank using the appropriate form of the verb:
I meant to phone Diane last night but I _______ (forget) to.

• A. forgets
  
• B. forgot
• C. has forgotten
  
• D. will forget
  

Answer 1

The correct option is B forgot

The simple past (also called past simple, past indefinite) is a verb tense which is used to show that a completed action took place at a specific time in the past. The simple past is also frequently used to talk about past habits and generalizations. The simple past is formed using the verb + ed. Questions and negative forms in statements are made with did and did not.

Since, we are talking about an action which has happened in the past, we will be using simple past tense. In this case, the verb is forget, the simple past form is, "forgot"

Option B is correct