Make the positive present perfect 1) (i / study / french) . 2) (she / eat / octopus) . 3) (they / go / to scotland) . 4) (we / read / that book) . 5) (he / live / here for three years) . 6) (you / know / david for ten years) . 7) (we / be / here for two weeks) . 8) (i / lose / my keys) . 9) (he / drink / too much coffee) . 10) (they / miss / the train) . 11) (she / go / to peru) . 12) (we / eat / too much chocolate) . 13) (i / have / breakfast this morning) . 14) (john / miss / the train) . 15) (lucy / cook / breakfast) . 16) (they / write / to the politician) . 17) (you / find / your wallet) . 18) (i / meet / his mother) . 19) (we / try / roller-skating) . 20) (she / pass / the exam) .

1)I have studied French
2)She has eaten an octopus
3)They have gone to Scotland
4)We have read that book
5)He has lived here for three years
6)You have known David for 10 years
7)We have been here for 2 weeks
8) I have lost my keys
9) He has drunk too much coffee
10) They have missed the train
11)She has gone to Peru
12)We have eaten too much chocolate
13)I have had breakfast this morning
14) John has missed the train
15) Lucy has cooked the breakfast
16) They have written to the politician
17)You have found your wallet
18) I have met his mother
19) We have tried roller-skating
20) She has passed the exam

Present Perfect positive :
I/you/we/they + have + verb(3 form)
He/she/it + has + verb (3d form)

sent Perfect negative
все то же самое только haven't / hasn't
 
question :
Have + I/YOU/WE/THEY  + verb (3d form)
Has + He/she/it + verb (3d form)

Here are four seasons in a year: spring, summer, autumn and winter. Every season is beautiful in its own way.

When spring comes nature awakens from its long winter sleep. The days become longer and the nights become shorter. The ground is covered with emeraldgreen grass and spring flowers. The air is fresh, the sky is blue and cloudless, and the sun shines brightly. The trees are in full blossom. The nightingale begins to sing its lovely songs, and sweet melodies may be heard from every wood and park. The days are warm and everything is full of life and joy.

Spring is followed by summer. The weather is usually fine in summer, but it can be very hot, especially in July. Sometimes there are storms with thunder and lightning. In summer people try to get away from the city noise and spend more time in the open air. They pick mushrooms and berries in the forest, swim in the rivers and lakes, go fishing and boating. Most people prefer to have their holidays in summer.

Autumn begins in September. The days become shorter and the nights become longer. The leaves turn yellow, red and brown and fall to the ground. Most birds fly away to warm countries. There's a short spell of dry sunny weather in September which is called Indian Summer. It's a beautiful time when the sky is cloudless, the trees around are golden, the air is transparent and it's still warm. But gradually it gets colder and colder. It often rains in October and November which makes autumn an unpleasant season.

In winter the sun sets early and rises late. The rivers and lakes are frozen over. Everything is covered with snow. Sometimes it's very cold, about 25-30 degrees below zero. Going out in such weather isn't very pleasant. Winter is a good time for sports. People go in for skating and skiing. Tobogganing is also popular, not as a kind of sports, but rather as fun.

As for me, I like all seasons, but I think there's nothing like late spring.

Объяснение:

Спишите предложения, расставляя пропущенные знаки препинания. Составьте схему одного сложносочиненного предложения. Запишите одно предложение в виде предложения с цитатой, выбрав один из цитирования.

 

1. Биотехнологии решать проблемы обеспечения населения продовольствием минеральными ресурсами также они перспективны в фармацевтическом производстве охране окружающей среды. 2. Успеха добились ученые из двух стран. Российские генетики создали мышь Машу а британские овец Меган и Мораг. 3. Растения и сами прекрасно воспроизводят свои копии но вопрос с точным воспроизведением животных долгое время оставался проблематичным. 4. В природе размножение через воспроизведение генетически идентичных особей весьма распространено и поэтому говорить о клонировании как о чем-то принципиально новом неверно. 5. Можно ли проводить эксперименты на человеке и до какого предела допустимо вторжение в природные процессы? 6. Новейшие биотехнологии создают огромные возможности вмешательства в жизнедеятельность организмов или они с неизбежностью ставят ученых перед нравственным вопросом.