Нужна помощь по английскому языку. Видовременные формы глагола в активном и пассивном залогах.

Question

1. Подчеркните глагол-сказуемое и определите его видо-временную форму и залог. 
 a) Astronomers have measured the exact length of the day. 
 b) I’m sure the problem will be solved. 
 c) He had already left when I came there. 
 d) I was waiting for you the whole evening. 
2. Подчеркните Participle I и Participle II и установите их функции в предложении – определение, обстоятельство или часть глагола – сказуемого. 
 a) Testing the operation of the system, engineers used different kinds of equipment. 
 b) When electrified a body may repel as well as attract different objects. 
 c) Heat gained by one substance is heat lost by another. 
3. Подчеркните модальные глаголы или их эквиваленты. 
 a) Infra-red waves can be stopped by glass. 
 b) Nobody will be able to translate this text without a dictionary. 
 c) This substance is to be heated before the experiment. 
 d) He had to return home as he had left his bag.

Евгений · Accepted Answer

1. A) have measured - Present Perfect Active 
B) am sure - Present Simple Active, will be solved - Future Simple Passive 
C) had left - Past Perfect Active, came - Past Simple Active 
D) was waiting - Past Continuous Active

Ник · Answer

1.a)have measured - Present Perfect Active 
b) am sure - Present Simple Active ; will be solved - Future Simple Passive 
c) had left - Past Perfect Active ; came - Past Simple Active 
d) was waiting - Past Continuous Active 
 
2. a) testing - Participle 1 в функции обстоятельства 
b) electrified - Participle 2 в функции обстоятельства 
c) gained, lost - Participle 2 в функции определения 
 
3. a) can 
b) will be able to 
c) is to 
d) had to