1. The cadets plotted the route on charts at every lesson.
2. The sailors cleaned the holds.
1. The cadets will plot the route on charts at every lesson.
2. The sailors will sometimes clean the holds.
1. It may rain may soon.
2. Can you show me the way to the port?
3. I could not come because I was busy.
4. Must we go to the port tomorrow? - No, we need not.