[Rusty]

Originally Posted by aleCcowaN

Would you write in Spanish some examples using present tense? Then we'll be able to tell you how to say the same using some of the past tenses.

JazzHeart, this is a very LARGE topic. There is no easy one-ending-fits-all answer.
Spanish has two past tenses. The preterite tense has many irregular verbs (which shouldn't surprise you, since the present tense has many irregular verbs, as well). The imperfect tense has only three irregular verbs. Learning when to use the two different past tenses will take some time.

Adding -ing to a verb can be a very LARGE topic, as well. First, you need to make absolute certain that you understand the difference between a verb that ends in -ing and a noun that ends -ing. The latter is called a gerund in English. It looks like a verb, but it functions as a noun. For example, in the sentence 'Reading is fun,' the word 'reading' is a noun.
The Spanish equivalent is the infinitive - leer.

The Spanish infinitive correr (run) needs to be conjugated to use it as a verb. For example, the English sentence 'We run' is '(nosotros) corremos' in Spanish. The verb ending conveys the person, so the subject pronoun doesn't need to be said (that's why I enclosed it in parentheses). The Spanish sentence 'Corremos' also means 'We are running'. In English, we make a distinction between 'we run' and 'we are running', but this isn't the case in Spanish. The simple present tense can be used to mean both things.

That said, there is a progressive, or continuous, tense in Spanish that involves a conjugated form of 'estar', followed by a gerundio (this is called the present participle in English). In the progressive tense, 'We are running' is conjugated as 'estamos corriendo'. This tense is only used when you are in the very act of doing something. If someone asks you what you're doing while you're out for a morning run, you could say 'estoy corriendo'. Formation of the gerundio is mostly straight forward - the '-ar' verb ending is dropped and '-ando' is substituted; the '-er' and '-ir' verb endings are substituted with '-iendo'. There are some irregular formations.
Do not overuse the progressive tense.

These explanations don't even scratch the surface, but I hope they helped a little.
The verb conjugation charts you're looking for are found in the upper left-hand side of each page. Select 'conjugations' instead of 'dictionary' and type in the infinitive you want to see conjugated.