Concise, but thorough English explanation of indirect object pronouns in Spanish grammar. Also explains how to use direct and indirect object pronouns together.

[Free Registration/Login may be required to access all resource tools.] Explanations and examples that teach how to distinguish between subjects, verbs, direct objects and indirect objects in sentences as well as how to identify be,...

Use the four-step trick that's on this grammar tips site and you will never have to wonder which to choose, "who" or "whom," again. There is a self test at the end of the article.