The main clause, when it follows the concessive clause, may be emphasized by means of yet, still, nevertheless.

Concessive clauses sometimes omit the copula and its subject.

400. For the distinction between the indicative and the subjunctive in concessive clauses, see [§ 279]; for that between should and would, see [§ 305].

401. A concessive clause may be introduced by the conjunction as, or by a relative pronoun or a relative adverb.

Note. The adverbial use of however is quite distinct from its use as a coördinate conjunction ([§ 362]).

402. Concession is sometimes expressed by a subjunctive clause without a conjunction to introduce it ([§ 281]).