For most verbs you add an 'ed' at the end of the word to change it to the past tense - for example, 'she talks' becomes 'she talked'. However, there are some irregular verbs where the whole word ...

One’s tense will vary depending on what one is trying to convey within their paper or section of their paper. For example, the tense may change between the methods section and the discussion section.

You use the perfect tense when, in English ... Let’s start with ar verbs. For example, he hecho mis deberes - 'I have done my homework.' As you go around telling people what you’ve done ...