Task 1. Fill the gapes with the verbs in Present Tenses.
1. Doctors _________have cured_______(to cure) many deadly diseases in recent decades.
2. In last 100 years scientists ________________ (to split) the atom and discovered DNA.
3. Mary ________________(to master) Spanish, but she can communicate.
4. Every twelve months, the Earth ________________ (to circle) the Sun.
5. She does ________________ (to need) help right now.
6. The students ________________ (to have) three tests this month.
7. Paul ________________(to talk) to several doctors about his problem, but nobody knows why he is ill.
8. I ________________(to study) to become a vet since 2015
Ответы
Ответ:
1. Doctors have cured many deadly diseases in recent desades.
2. In last 100 years scientists have split the atom and discovered DNA
3. Mary hasn't mastered Spanish, but she can communicate.
4. Every twelve months, the Earth circles the Sun.
5. She does need help right now.
6. The students have had three tests this month.
7. Paul has talked to several doctors about his problem, but nobody knows why he is ill.
8. I have been studying to become a vet since 2015.
Объяснение:
1 - Present Perfect.
2 - Present Perfect.
3 - Present Perfect.
4 - Present Simple.
5 - Present Simple.
6 - Present Pefect.
7 - Present Perfect.
8 - Present Perfect Continuos.
Во втором по смыслу, что они начали делать сто лет назад и к этому моменту закончили. В Present Perfect - начали когда-то делать и закончили к какому-то моменту.
Регулярно, с частотностью - Present Simple.
В последнем Present Perfect Continuos, потому что начали в прошлом, но до сих пор не закончили.
Present Perfect образуется: have/has + Ved/V3.
Present Simple образуется: V/V + s(es)
Present Perfect Continuos образуется: have/has + been + Ving
Ответ:
1. Doctors have cured many deadly diseases in recent decades. (Present Perfect)
2. In last 100 years scientists have split the atom and discovered DNA.(Present Perfect)
3. Mary hasn't mastered Spanish, but she can communicate. (Present Perfect)
4. Every twelve months, the Earth circles the She does need help right now. (Present Simple)
6. The students have had three tests this month.( Present Perfect)
7. Paul has talked to several doctors about his problem, but nobody knows why he is ill.(Present Perfect)
8. I have been studying to become a vet since 2015(Present Perfect Continues)
Смотрим по переводу, смыслу и сопутствующие словам
Например, every 12 months-сопутствующее выражение Present Simple
А since 2015-Present Perfect Continues