Question

In which sentence is the underlined verb irregular?

A. I learned about the Texas state flower.
B. My teacher taught us the history of the Texas state flag.
C. My teacher has helped us learn about how Texas became a state.

Answer 1

My teacher taught us the history of the Texas state flag.

Answer 2

What are the underlined verbs? Learned, Taught, Helped,
With this, you have to put 'Have' in front of the verbs.
We (have) Learned
Teacher (have) taught us There is no reason to go beyond this, B is the irregular one.