Question

Найдите и выпишите из текста глаголы и укадите их временную форму. Помогите пожалуйста
Sometimes we think about our life and world around us. Who were we in the past? How did scientists classify all living things? Why are we mammals? These questions are not simple. Scientists describe each kind of plants and animals in their works. They are constantly observing habits and behavior of vertebrates and invertebrates. It is also useful to study the influence of heredity on the human. This attention to human`s heredity will help to find necessary medicine for some diseases.​

Answer 1

1. think (present simple)
2.were (past simple)
3.did (past simple)
4.are(present simple)
5.are not (present simple)
6.describe (present simple)
7.are observing (present continuous)
8.is (present simple)
9.will help to find (future simple)