Learn English - Speak English : Free reference guides to English grammar, speaking, writing and practical usage http://www.perfectyourenglish.com perfectyourenglish/vkhwhttp://feedburner.google.com The tense of a verb in the Subordinate clause should be in accordance with the tense of the verb in the main clause.If the verb in the principal clause is in the past tense, the verb in the subordinate clause will be in the corresponding past tense.If the verb in the principal clause is in the present or the future tense, the verb in the subordinate clause could be in any tense, depending upon the sense to be expressed. Learn more. <p><a href="http://feedads.g.doubleclick.net/~a/vmrkSQiXz_nyGHu9RLg-oJ7ST38/0/da"><img src="http://feedads.g.doubleclick.net/~a/vmrkSQiXz_nyGHu9RLg-oJ7ST38/0/di" border="0" ismap="true"></img></a><br/> <a href="http://feedads.g.doubleclick.net/~a/vmrkSQiXz_nyGHu9RLg-oJ7ST38/1/da"><img src="http://feedads.g.doubleclick.net/~a/vmrkSQiXz_nyGHu9RLg-oJ7ST38/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/perfectyourenglish/vkhw/~4/IL-qoNa_KvU" height="1" width="1"/> http://www.perfectyourenglish.com/grammar/sequence-tenses-2.htm