6. Use SHOULD or MUST:
Example:(a) You should clean your tools before you use them.
(a) Here is some advice: clean your tools before you use them.
(b) This is a rule: switch off the electricity before you touch a bare wire.
(c) Here is a rule: do not smoke near petrol.
(d) This is some advice: always sharpen chisels before you use them.
(e) Here is a rule:always wear goggles when you grind a chisel.
(f) This is some advice: never use a screwdriver for opening a tin of paint.
(g) Here is some advice: use a narrow brush for painting corners.
(h) This is a rule: never do any welding without a helmet or goggles.