Перепишите предложения, подчеркните в каждом из них глагол-сказуемое, определите его видовременную форму и залог. ...

1) Grey and white cast-iron is made by remelting pig iron. - is made - сказуемое, Present Simple Tense, Passive voice.

2) The term «horse power» was introduced by James Watt. was introduced - сказуемое, Past Simple Tense, Passive voice.

3) The atoms are built of negative electrons, positive protons and ordinary utrons. are built - Present Simple Tense, Passive voice.

4) The alloys will be experimented uron in our lab next week. - will be experimented - сказуемое, Future Simple Tense, Passive voice.

5) The properties of these metals were studied in our research lab. - were studied - сказуемое, Past Simple Tense, Passive voice.