Grammar Unit 5 Lesson 3: Present Perfect

The sentence indicates that the action of living on 72nd Street started in the past and is still ongoing in the present. The present perfect tense is used to express an action that began in the past and has a connection to the present. Therefore, the correct answer is "have lived."

The correct answer is "hasn't arrived" or "has not arrived." In the present perfect tense, we use the auxiliary verb "has" or "have" followed by the past participle form of the main verb. In this case, the main verb is "arrive," and its past participle form is "arrived." Since the sentence is in the negative form, we use "hasn't" or "has not" followed by the past participle form "arrived." This form indicates that the train did not arrive on time this week.

The sentence indicates that the action of working at home started in the past and is still ongoing in the present. The present perfect tense is used to convey this idea. "Have worked" is the correct present perfect form of the verb "work" in this sentence.

The present perfect form of the verb "cleaned" is "have cleaned." This form is used to indicate an action that started in the past and is still relevant or has just been completed. In this case, it suggests that the sisters cleaned the room on their own at some point in the past, and it is implied that the room is still clean or the act of cleaning has recently been finished.

The original sentence is a declarative statement, stating that the soccer team has returned from the tournament. To change it to an interrogative sentence, we need to invert the subject and the auxiliary verb "has." The correct interrogative form is "Has the soccer team returned from the tournament?"

The correct answer is "Have they talked lately?" because it follows the structure of an interrogative sentence in the present perfect tense. The sentence begins with the auxiliary verb "have," followed by the subject "they," and ends with the past participle of the verb "talked." The word "lately" is included to indicate that the action of talking occurred recently.

The original sentence "Computers have replaced classrooms this last month" is in the affirmative form. To change it to an interrogative form, we need to invert the subject "computers" and the auxiliary verb "have". Additionally, we should ensure proper spelling. Therefore, the correct interrogative sentence is "Have computers replaced classrooms this last month?"

The sentence is written in present perfect tense, which is formed by using the auxiliary verb "have" followed by the past participle of the main verb. In this case, the main verb is "ask" and its past participle is "asked." Therefore, the correct sentence is "They have asked a question."

The correct sentence is "She has applied the face mask to her skin." This sentence uses the present perfect tense ("has applied") to indicate that the action of applying the face mask to her skin was completed in the past and has a connection to the present. The use of "has" with the past participle "applied" is grammatically correct and conveys the intended meaning.

The correct answer is "hasn't changed" or "has not changed" because the sentence is in the present perfect tense and is referring to an action that started in the past and is still continuing in the present. The present perfect tense is formed by using the helping verb "has" or "have" followed by the past participle form of the main verb. In this case, the past participle of "change" is "changed." Since the sentence is negative, we use "hasn't" or "has not" instead of "has."

The correct answer is "has not." This is because the sentence is in the present perfect tense and is referring to an action that has not happened in the past. "Has not" is the correct form of the verb "to have" in the present perfect tense when used with the subject "Tom."

The present perfect form of the verb "carry" is "have carried". This form is used to indicate an action that started in the past and is still ongoing or has just been completed. In the given question, the verb "carry" is being used in the present perfect form to ask if those boys have been carrying the packages for 10 minutes.

The correct sentence is "We are at home. We have stayed here for a week." This sentence is correct because it uses the present tense "are" to indicate the current state of being at home, and the present perfect tense "have stayed" to indicate an action that started in the past and continues up to the present moment. The sentence also correctly uses the preposition "for" to indicate the duration of one week.

The correct answer is a sentence in the present perfect tense, which is formed by using the auxiliary verb "has" or "have" followed by the past participle of the main verb. In this case, the main verb is "pay" and the past participle is "paid." The negative form of the present perfect is formed by adding "not" after "has" or "have." Therefore, the correct answer is "Marilyn has not paid the bill" or "Marilyn hasn't paid the bill."

The correct question is "Have they educated their students?" This is because the sentence is in the present perfect tense, which is used to talk about actions that started in the past and are still relevant in the present. The question is asking whether or not "they" (the subject) have educated their students.

The word "lately" is the correct answer because it indicates that the speaker has not studied the lesson in the recent past. It implies that the speaker has not studied the lesson in the recent period of time leading up to the present moment.

The correct answer is "They haven't danced since the party began., They have not danced since the party began."

The correct question is "Has his friend selected the game?" because it follows the correct structure for forming a question in the present perfect tense. The auxiliary verb "has" is used to indicate that the action of selecting the game was completed in the past, and the subject "his friend" is placed before the verb.

The correct answer is "today" because the question is asking if the person has talked to Martha recently. "Today" indicates that the conversation could have taken place on the same day as the question was asked.

The correct answer is "hasn't ever". This is the most appropriate choice because it indicates that it has not rained for a week at any point in the past. The word "hasn't" is the contraction of "has not", indicating the absence of rain, and "ever" emphasizes that there has been no occurrence of rain for a week.