Editing Conditional sentence (section)

===Implicative and predictive===
A conditional sentence expressing an ''implication'' (also called a ''factual'' conditional sentence) essentially states that if one fact holds, then so does another. (If the sentence is not a [[declarative sentence]], then the consequence may be expressed as an order or a [[question]] rather than a statement.) The facts are usually stated in whatever [[grammatical tense]] is appropriate to them; there are not normally special tense or [[grammatical mood|mood]] patterns for this type of conditional sentence. Such sentences may be used to express a certainty, a universal statement, a law of science, etc. (in these cases ''if'' may often be replaced by ''when''):
::If you heat water to 100 degrees (°C)&nbsp;, it boils.
::If the sea is stormy, the waves are high.

They can also be used for logical deductions about particular circumstances (which can be in various mixtures of past, present, and future):
::If it's raining here now, then it was raining on the West Coast this morning.
::If it's raining now, then your laundry is getting wet.
::If it's raining now, there will be mushrooms to be picked next week.
::If he locked the door, then Kitty is trapped inside.

A ''predictive'' conditional sentence concerns a situation dependent on a hypothetical (but entirely possible) future event. The consequence is normally also a statement about the future, although it may also be a consequent statement about present or past time (or a question or order).
::If I become President, I'll lower taxes.
::If it rains this afternoon, everybody will stay home.
::If it rains this afternoon, then yesterday's weather forecast was wrong.
::If it rains this afternoon, your garden party is doomed.
::What will you do if he invites you?
::If you see them, shoot!