Question

ОЧЕНЬ ОПРЕДЕЛИТЬ ИНФИНИТИВ КАЖДОГО ГЛАГОЛА В ПРЕДЛОЖЕНИЯХ. Перепишите следующие предложения, определите в них видовременные формы глаголов и укажите их инфинитив.
1. These radioactive substances which the atomic furnace can produce in great quantities have proved valuable in almost every field of human life.

2. The nuclear reactor generates tiny, swiftly moving pieces of atoms.

3. The atomic furnace - flameless, almost entirely automatic is being used to make steam for generating electricity.

4. During the middle years of the 19th century scientists had discovered that when an electric current was passed between two electrodes placed at the end of a partially evacuated glass tube.

5. While German scientists were experimenting with radioactive polonium, they detected a strong radiation.

Answer 1

1. produce - Present Simple, инфинитив без to следует после модального глагола

have proved - Present Perfect, инфинитив - to prove

2. generates - Present Simple, инфинитив - generate

3. is being - Present Continuous Passive voice, инфинитив - to be

to make - инфинитив

4. had discovered - Past Perfect, инфинитив - to discover

was passed - Past Simple Passive voice, инфинитив - to pass

5. were experimenting - Past Continuous, инфинитив - to experiment

detected - Past Simple, инфинитив - to detect