The perfect tense is made of the verb haber and a past participle. Some verbs have irregular past participles. Irregular past participles include: dicho (said), hecho (done) and visto (seen).

Use the present tense to describe what you do and what things are like. The present continuous can be used to talk about what is happening now. This video provides an explanation of the uses of the ...

The introduction is usually in present tense due to the fact that you are presenting facts and background information on your research topic. By having this information in present tense, you are ...