1.What is the weight of a teaching robot?
->How heavy is a teaching robot 
2.That's good idea to repaint the fence.
->Let's  repaint the fence.
3.The sofa is too heavy for me to move on my own.
->The sofa isn't light   for me to move on my own.
4.This robot is so strong that it can do many things
->It't such a strong robot that it can do many things
5.This one is the fastest in the robot show
->No other robot is as fast as this one