Work in pairs. Read and say how old the ancient Greek theatre is. Since we all live in AD or CE (Common Era) years now, there is no need to say "AD", it is understood. So, it is 2020 AD, but all that you say is 2020. If you have a date in BC or BCE (Before Common Era) and you want to find out how long ago it was, you just add it to the current year. So, if we want to know how long ago 1000 BC was, it was 3020 years ago (2020 + 1000 = 3020).​

1/  has increased - present perfect active voice

2/ are discussing -present continuous active voice

3/started- past simple active voice, had retired -past perfect active voice

4/spent- past simple active voice, was raining- past continuous active voice

We have carefully studied (Participle II - часть сказуемого) all the technical data that we got from you

The machine tool advertised(Participle II - определение) by Brown and Co will be in great demand on the   market.

By 5 o’clock they had cleared (Participle II - часть сказуемого) up all the points in the firm’s offer.  

Peter saw her at the University library when he was working (Participle I - часть сказуемого) for his final examinations

Подчеркните в каждом предложении Participle I и Participle II и установите функции каждого из них, т. е. укажите, является ли оно определением, обстоятельством или частью глагола-сказуемого.  

1. We have carefully studied all the technical data that we got from you.  

(Participle II - часть глагола-сказуемого)

2. The machine tool advertised by Brown and Co will be in great demand on the market.  

(Participle II - определение)

3. By 5 o’clock they had cleared up all the points in the firm’s offer.  

(Participle II - часть глагола-сказуемого)

4. Peter saw her at the University library when he was working for his final examinations.

(Participle I - часть глагола-сказуемого)

Подчеркните в каждом предложении глагол-сказуемое и определите его видовременную форму и залог.  

1. The factory has increased its production greatly.  

(Present Perfect Active)

2. The partners are discussing the terms of payment now.  

(Present Continuous Active)

3. He started a small advertising agency after he had retired from the military service.  

started - (Past Simple Active)

had retired - (Past Perfect Active)

4. The children spent the whole day indoors because it was raining heavily.

spent - (Past Simple Active)

was raining - (Past Continuous Active)