Past time expressions

The PAST PERFECT TENSE indicates that an action was completed (finished or "perfected") at some point in the past before something else happened. This tense is formed with the past tense form of "to have" (HAD) plus the past participle of the verb (which can be either regular or irregular in form)...

Choose the word that best completes the sentence....

Read carefully all the instructions and identify nouns....

Unit 7: Work. National Geographic, Learning. Life student´s book...