Hi, I'm a native Spanish speaker. The translate for these sentences are: 1. Ella me gusta. 2. Le gusto. (In this case it refers to a woman) 3. Le gustamos. (In this case is the same) 4. Ella no me gusta. The word "gustar" in spanish is used to refer that someone or something likes to you very much.

To use the verb "gustar" right, you just have to imagine that you're using the verb "to please". The English subject becomes the object and the English object becomes the subject as if you were using "to please" instead of "to like", for example: 1. She likes me--- Le gusto (I please her). Also, with all the pronouns made more explicit: "yo le gusto a ella" 2. I like her---Me gusta (She pleases me). Or "Ella me gusta" or also "ella me gusta a mí" if you make the pronouns more explicit. 3. We like her.--- Nos gusta (she pleases us). Or "Ella nos gusta" or "ella nos gusta a nosotros". 4. She doesn't like me -------"No me gusta". Or "Ella no me gusta" or "ella no me gusta a mí". That's the general rule. "I like bananas" would be "los plátanos me gustan" (bananas please me) and "I like winter" would be "el invierno me gusta" (winter pleases me). The subject can also go after the verb in Spanish and it's very common with "gustar", but it's still the subject and you have to make the verb concord with it ("me gustan los plátanos" but "me gusta el invierno"). "Maria likes apples" would be "las manzanas le gustan a María" (apples please Maria). The person who likes it become the person who is pleased by apples and goes after the verb introduced by "a". That complement is often anticipated before the verb by an indirect object pronoun ("le" in this case). The order can be changed to "a María le gustan las manzanas" and that would be more common, but always consider that the subject is "manzanas" and the verb concords with it.

1. Yo le gusto a ella 2.Me gusta ella 3 Nos gusta ella 4.Yo no le gusto a ella.

Well, the "she doesn't like me" part was wrong as I gave it. Since this is a bit confusing because this is the other way round when compared to English I got mixed up. "She doesn't like me" would be "no le gusto", "yo no le gusto" or "yo no le gusto a ella"(I don't please her). But you get the idea.