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Hi. I have a task to find verbs in the past tense in the text given to me.

Some examples from the text:

He has to think not only of what he wants the building to look like when it is finished, but also what it is to be used for.

He must not forget the sort of material to be used in the building.

The oldest monuments which are met within architecture are the colossal pyramids of Egypt most of which were constructed about 6,000 years ago.

The pyramids are large, triangular buildings which were placed over the tombs of Egyptian kings.

Astronomy and philosophy were known and studied.

My question is: are these verbs in the past tense or am I confusing something (I think so)?

Comments  

I'm confused. It's Passive Voice, yeah? If it's Passive Voice, which verbs should I indicate?

*Question about 'were known' and more

Students: We have free audio pronunciation exercises.

FULL TEXT:

Architecture is the art which makes buildings beautiful to look at as well as useful. A man who designs buildings and makes the plans for them is called an architect. He has to think not only of what he wants the building to look like when it is finished, but also what it is to be used for. He must not forget the sort of material to be used in the building. This may be stone, brick, wood or steel and concrete. There have been many different styles or kinds of architecture in the past and there are many different styles today in different parts of the world. The oldest monuments which are met within architecture are the colossal pyramids of Egypt most of which were constructed about 6,000 years ago. The pyramids are large, triangular buildings which were placed over the tombs of Egyptian kings. The best known of the pyramids are a group of three built at Giza south of Cairo. The largest of these is 482 feet high. They tell us of the advanced civilization of ancient Egypt which is much spoken about even in our days. It was a country which had expert mathematicians and engineers, where astronomy and philosophy were known and studied. The country was rich in hard and durable stone, but poor in timber and metal, so that the main material used for construction was granite, and this was the reason for the durability of the pyramids. Large blocks of stone were transported over long distances by land and water, and placed into position with the help of the most primitive equipment. That was done by slaves working for thirty or forty years. All this great amount of work was done, masses of material and a large territory sometimes of about 52,000 square meters were used, only for protecting the body of a dead king and constructing a dwelling place for his happy life in the "other world".

Do not pay attention to the words in italics.

Which verbs should I indicate as verbs in the past tense?