I was shopping the street.请问这句话正确吗

题目

I was shopping the street.请问这句话正确吗
另外 If we do,our teacher will mad.这句话是否有语病

答案

第一句话应该是I was shopping in the street.
第二句话中do是及物动词,后面应该有宾语,加it,后半句will是表示时态的,后面应该加be,所以应该改为If we do it,our teacher will be mad.