Преобразуйте предложения в во и отрицательные.

1. She had been working in the library for 3 years before she entered the Philology Faculty.

2. She has been growing those flowers for the whole summer.

3. They had been taking the examination for 3 hours when the dean came.

4. We have been studying Russian for 10 years.

5. My brother has been staying with us for 3 weeks.

6. They had been watching TV for half an hour when their parents came.

7. He will have been writing a letter for three hours when you come.

8. She will have been watching this film for an hour tomorrow when you ring her up.

9. It has been snowing heavily the whole night.

10. She had been studying French for 5 years before she could speak it fluently.

Объяснение:

My mom always helps me with my homework

I have never ate Mexican food

I usually wake up at 10 o’clock

My friends often play football

Sometimes people are kind to me

I rarely go abroad

My mom seldom eats fast food

I hardly ever been to Moscow (любой другой город)

I drink tea every day

I go out with friends once a week

My parents make me go to dentist every month

We go abroad every year

My dad has never been to USA

My friend always makes me laugh

Her friends are usually busy, so they barely go out together

The person that I admire the most is scientist   Isaak Mendeleev.He was born on 8 February 1834 in Verhnie Aremzyani village, near Tobolsk  . His grandfather was Pavel Maximovich Sokolov, a Russian priest. Ivan, along with his brothers and sisters, obtained new family names while attending theological seminary. 2) In 1849, the now poor Mendeleev family relocated to St. Petersburg, where he entered the Main Pedagogical Institute in 1850. After graduation, an illness that was diagnosed as tuberculosis caused him to move to the Crimean Peninsula on the northern coast of the Black Sea in 1855. While there he became a science master of the Simferopol gymnasium №1. He returned with fully restored health to St. Petersburg in 1857. 3)
Between 1859 and 1861, he worked on the capillarity of liquids and the workings of the spectroscope in Heidelberg. In the late August of 1861 he wrote his first book on the spectroscope in which it received high acclaim. In 1862, he married Feozva Nikitichna Leshcheva. Mendeleev became Professor of Chemistry at the Saint Petersburg Technological Institute and the University of St. Petersburg in 1863. In 1865 he became Doctor of Science for his dissertation "On the Combinations of Water with Alcohol". He achieved tenure in 1867, and by 1871 had transformed St. Petersburg into an internationally recognized center for chemistry research.4)he reason I admire him is because he is very intelligent and brave, and he never gives up on life.Mendeleyev had a difficult character: he did not let anyone down, pointing out mistakes directly. However, he himself did not like it if someone pointed out his mistakes. He combined the qualities of a great scientist-thinker and a simple craftsman.
He had a hobby - he made suitcases, twisted books. He was a patriot of his country, gave all his strength to strengthen the industry of, sought to free it from the economic and scientific dependence of the West. But I did not always find support from my colleagues in this.