VI. CONDITIONAL SENTENCES

411. A clause that expresses a condition introduced by if, or by some equivalent word or phrase, is called a conditional clause.

A sentence that contains a conditional clause is called a conditional sentence.

412. A conditional sentence in its simplest form consists of two parts:—

(1) A subordinate (adverbial) clause, commonly introduced by if, and expressing the condition.

(2) A main clause expressing the conclusion, that is, the statement which is true in case the condition expressed in the if-clause is true.

Thus in the first example in [§ 411], the condition is if it rains; the conclusion is we shall remain at home.

Either the condition or the conclusion may come first.