1. Walking on the street, I found a stray dog.

Question

2. While I was walking on the street, I found a stray dog.

3. When I was walking on the street, I found a stray dog.

4. While I walked on the street, I found a stray dog.

5. When I walked on the street, I found a stray dog.

(Among the four sentences, which one is similar to Sentence 1?)

Answer 1

All sentences 2-5 mean the same as sentence 1.

=)