Question

Open the brackets. Use the Present Perfect Simple Tense or the Present Perfect Continuous Tense. Mom is tired because she (make) pancakes since two o'clock.

Answer 1

Mom is tired because she has been making pancakes since two o'clock

Answer 2

Mom is tired because she has been making pancakes since two o'clock.

Explanation: In this sentence, we need to use either the Present Perfect Simple Tense or the Present Perfect Continuous Tense.

The Present Perfect Simple Tense is used to talk about an action that started in the past and is still relevant in the present. It is formed by using the auxiliary verb "have" or "has" followed by the past participle of the main verb.

The Present Perfect Continuous Tense is used to talk about an action that started in the past, is still ongoing, and may continue into the future. It is formed by using the auxiliary verb "have" or "has" followed by "been" and the present participle (-ing form) of the main verb.

In this case, we should use the Present Perfect Continuous Tense because the action of making pancakes started in the past (two o'clock) and is still ongoing, resulting in Mom feeling tired.

Therefore, the correct sentence is: "Mom is tired because she has been making pancakes since two o'clock."