normal . standard
To speak at a standard or normal speed , is this correct?

Wht if it is fast or slow ? speak at slow -fast speed?

Question

normal . standard
To speak at a standard or normal speed , is this correct?

Wht if it is fast or slow ? speak at slow -fast speed?

Answer

Speed generally cannot be "fast" because speed is not something that moves. In this case, it would be "high" speed or "low" speed, or any other descriptor. So if fast or slow, you'd just say, "To speak fast or slow," or "To speak quickly or slowly."