I: If he will jump, you will not have to.
II: If he will jump, he can win.
III: If he will jump, he may win.
IV: If he will jump, you must follow.
V: If he will jump, you dare not follow.
VI: If he will jump, you need not follow.
VII: If he escapes, catch him.
VIII: If he escapes, you can catch him.
IX: If he escapes, you catch him.
X: If he escapes, you could catch him.
XI: If he escapes, you may catch him.
XII: If he escapes, you might catch him.