This excellent site explains numerous guidelines, complete with examples, for determining subject-verb agreement.

This site offers fundamental explanation of subject-verb agreement, additional information, and examples of exceptions to the general rules. Good information at this site, but does not link to other information.

Explanation of the irregular verb etre, with usage examples, interactive practice exercises (written and audio), and links to its usage as an auxiliary in compound tenses.

After a discussion and explanation of verbals in general, this site specifically discusses the gerund and the participle (with a link to the infinitive) and also provides examples of each.

This introduction to the present tense conjugation of the irregular verbs "dar", "ir" and "estar" is easy to understand and includes a short test at the end to test the student's mastery of this grammar principle.

Introduces conditional verbs. Begins with discussion of real and unreal conditional verbs. Offers a table of examples and links to additional information and exercises.

In this learning module, students learn how to talk about the past and things that happened to them in the past. They will also talk about common Hispanic meals and read about two famous Spanish authors. Includes games, exercises,...

A helpful outline of verb structures, including active and passive voice. Imperative, indicative, and subjunctive moods are also included. A printable version is linked.

This tutorial begins with a slide show which defines nominalizations; gives examples of adjectives and adverbs changed into nouns, gerunds, and infinitives. Practice with simplifying nominalizations is provided. It also offers a YouTube...