Verbals

Здравствуйте.Не могли бы помочь с определением видов конструкций
1. Having tested the new type of hoisting crane, the engineer offered some recommendations as to its use- having tested конструкция «Объектный падеж с причастием I»

2. With a minimum of changes having taken place in the post-tensioning system, one can be sure of obtaining a post-tensioned crack-free panel- having taken конструкция «Объектный падеж с причастием I»
3. The experiment having been finished the students left the laboratory- having been finished-затрудняюсь

Разве можно говорить о падеже, если речь не идет о существительном?

Выпишите глаголы-сказуемые, определите их видо-временную форму и залог.
1.Electricity is used to produce heat.
2.Today plastics are being applied for car bodies.
3.The electric cars will be widely used in future.
4.He worked at the plant all his life.
5.The device is being tested now.
6.Engineering progress opens up wide prospects before man.
7.The alloys were experimented upon in our lab.
8.Having been repaired,the engine began operating better.
9.I had been tested the device for two hours when you came.
10.I have never been there before.

помогите плиз
I. Перепишите следующие предложения, определите в каждом из
них видо-врсменную форму и залог глагола-сказуемого. Переведите
предложения на русский язык.
1. When much had been done in the study of ecology by our university it
became аn important scientific centre.
2. A curriculum of the new type of secondary school is offered by the Ministry
of Education.
3. The research of planets will be developed with the help of cosmic apparatus.
4. This material is unaffected by solar radiation.

Доброго времени суток)) нахожусь на начальной стадии изучения английского языка. Объясните, пожалуйста принципиальную разницу между просто have и have got, а то в интерн. не совсем понятно и однозначно написано))