§ 458. В условных предложениях с глаголами were» had, should, could, которые дходят в, состав сказуемого, союз if может быть выпущен. В таком случае в условном предложе нии используется непрямой порядок слов (инверсия):
Had he known it, he would Если бы он знал это, он не not have gone there, л пошел бы туда.
Were she at home, die would Бели бы Она была дома, она
ring me up. 4 позвонила бы мне по телефону.
Should you see her, invite her Беля вы все же увидите ее,
to the concert. то пригласите на концерт.
§ 448-456. Adverbial clauses of condition are mostly introduced by the conjunction if. A complex sentence containing an adverbial clause of condition is called a conditional sentence* Conditional sentences are divided into sentences of real condition and those of unreal condition.
In sentences of real condition the subordinate clause expresses a realizable supposition. If ал adverbial clause of real condition refers to the present or to the past, the predicate of it is expressed by the present or the past tense of the Indicative Mood but any tense required by sense as well as the Imperative Mood can be used in the principal : clause. If a sentence? of red condition refers to the future, the future tense is used only in the principal clause; the predicate of the subordinate clause is expressed by the present tense of the Indicative Mood; In rare cases it is expressed by the Suppositional Mood or. by Subjunctive L
In sentences of unreal condition the action of the subordinate clause is represented as doubtful, contrary
■ to reality or unrealizable. In sentences of unreal condition the Conditional Mood is used in the principial clause and Subjunctive II in the subordinate clause, .
If the action of the principal clause refers to the ' present or future, the Present Conditional is used in it; if it refers to the past — the Past Conditional is used.
If the action of the subordinate clause refers to the present or future, the Present Subjunctive II is used in it; if it refers to the past — the Past Subjunctive II is used.
Adverbial clauses of condition may be asyndetic if they contain the forms were, had, should, could which in this case are placed at the beginning of the clause before the subject in place Df the conjunction if.