It looks like you're looking for a transformation of the sentence about your father's taxi ride due to the rain. Here’s a possible way to rephrase it:

"My father went to work by taxi last Monday because it was rainy."

Transformed: "My father took a taxi to work last Monday due to the rain."

If you need a specific type of transformation (e.g., to a different tense, passive voice, etc.), just let me know!