Question

I was on my way home yesterday when suddenly a man____ into the road in front of me

Answer 1

本句中是一个固定句式，即: ...was doing/ was going to do/was to do等...when...，这个when是并列连词，可看作 and then (就在此时)，所以它后面句子的时态应该和前面一致，前面句子是was (一般过去时)，故后面应该也用一般过去时stepped。