Be careful in the use of your pronouns in this way, for you can express quite a different meaning. For example, if you say, I care more for you than he, you mean, I care more for you than he cares for you. But if you say, I care more for you than him, you mean, I care more for you than I care for him. A mistake like this might mean a great deal to you some time, if the one to whom you had been speaking had been studying a course in Plain English!

356. Adverb clauses of condition. These clauses are introduced by such conjunctions as, if, provided, supposing, unless, except, otherwise, though, notwithstanding, albeit, and whether. For example:

When subordinate clauses beginning with if, though or unless are joined to clauses containing might, could, would or should, the verb were is sometimes used with a singular subject, in such sentences as:

Sometimes in sentences like these, if is omitted in the clause, and the verb placed first. For example:

These clauses express something which is uncertain, or which is to be decided in the future; a supposition contrary to a fact or a wish. Occasionally you will find the verb be used instead of is, in clauses of this kind introduced by if, though, unless, except, lest, etc. For example:

In subordinate clauses connected by if, unless, etc., with a principal clause which expresses future time, the present form of the verb is used in the subordinate clause. For example: