PASSIVE VOICE
STRUCTURE
PRESENT SIMPLE
"We build hundreds of houses every year"
PRESENT CONTINUOUS
"The authorities are questioning two men"
PAST SIMPLE
"That waiter served the meal"
PAST CONTINUOUS
"They were building a new shopping center"
PRESENT PERFECT
"We have chosen Helen as the new president"
PAST PERFECT
"John had taken the pictures before his camera broke"
FUTURE "WILL"
"They will play the match tomorrow"
AGENT "BY"
INSTRUMENT "WITH"
WITHOUT THE AGENT
VERBS WITH TWO OBJECTS: buy, give, lend, offer, promise, sell, take, promise, send, etc.