Yes, both are OK.Hello,
Do both the two sentences below sound equally natural? For some reason, the second sentence sounds a little bit odd to me. But the grammar book I checked says that "as", "when" and "while" can be at the the beginning or at the end. So I'm just trying it out.
a) As/When/While the car was speeding down the street, it lost control and hit the pole.
b) The car lost control and hit the pole as/when/while it was speeding down the street.
Student or Learner