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 ...

Passive voice also allows one to help move words to emphasize them ... the ants and aid to protect them from herbivores.” One would use past tense to summarize one’s results Example: “In the future to ...

(Sentence 2 happens to be in the past tense, but 3 is not; both 2 and 3 are in the passive voice.) 2. The passive voice uses more words than the active voice ... Here is an appropriate example: "In ...