Question

Ex.1. Put the verbs in the brackets into the correct present or past tense.

SUBJECT: Dolphins vs Porpoises Project

Hi Uncle Joe,

How are you? I 1)………………..(need) your help! Our teacher 2)…………..(just/give) us an assignment for Monday about the difference between dolphins and porpoises. I 3)………………..(never/heard) about it before. I 4)…………………(read) articles on the Internet for hours, but there is so much information! Mum told me that you 5)…………….(work) as a marine biologist for years before you became the director of the aquarium, and you 6)…………(do) some research on this subject. Do you mind answering a few of my questions? 7)……..(you/know) if porpoises communicate with sound like dolphins do? Also, while I 8)………………(watch) a video yesterday, I 9)……………(notice) that the porpoises don’t have a long rostrum. Is this true of all porpoise species? The narrator might have mentioned it, but I 10)……………….(research) about cetaceans all day and I felt so tired by 11 pm that I couldn’t pay attention!​

Answer 1

Hi Uncle Joe,

How are you? I 1) need your help! Our teacher 2) has just given us an assignment for Monday about the difference between dolphins and porpoises. I 3) have never heard about it before. I 4) have been reading articles on the Internet for hours, but there is so much information! Mum told me that you 5) had been working as a marine biologist for years before you became the director of the aquarium, and you 6) had done some research on this subject. Do you mind answering a few of my questions? 7) Do you know if porpoises communicate with sound like dolphins do? Also, while I 8) was watching a video yesterday, I 9) noticed that the porpoises don’t have a long rostrum. Is this true of all porpoise species? The narrator might have mentioned it, but I 10) had been researching about cetaceans all day and I felt so tired by 11 pm that I couldn’t pay attention!​

Объяснение

1) need относится к глаголам эмоционального состояния, а они не употребляются во временах Continuous

2) нет указания на точное время, когда дано задание, а есть слово just - маркер Present Perfect

3) речь о периоде времени до момента речи

4) Present Perfect Continuous подчеркивает длительность действия, которое длилось до момента речи

5) Past Perfect Continuous указывает на то, что действие длилось долгое время до какого-то момента в прошлом

6) Past Perfect выражает действие, которое произошло до указанного момента в прошлом.

7) Present Simple, поскольку know в Continuous не используется как глагол мыслительной деятельности
8) Past Continuous для действия, которое длилось, когда произошло что-то ещё
9) однократное "быстрое" действие в прошлом
10) занимался исследованием весь день (длительное действие) ДО того, как стал смотреть видео => Past Perfect Continuous