Past, Present, Future and Conditional are common tenses in any language. Begin learning these forms. Use Vocabulix to memorize the various tenses online and free.
Brad, South Africa: 'Good. Good. Good. Very good. It wasn't easy to find a free vocabulary site for my Spanish studies. Happy I have found it!'
'The important thing is to keep learning, to enjoy the challenge, and to tolerate the ambiguity. In the end there are no certain answers.'