1.We .(to have) enough water in future if we...( to be) careful with it. 2.If we. (to destroy)the places where animals they..(to be ) in danger. 3. Forest animals ... ( to live) in danger if people (to cut) the forest. 4.If schoolchildren. (to write) in their notebooks until theyare completely filled out they .(to reserve) some trees.5.lf people .(to recycle)old things they .(reserve) natural resources.
Present simple - I Visit My Friend.
Past Simple - I visited My Friend
Future Simple - I will visit My Friend
Present Continious - I am visiting my friend
Past continuous - I was visiting your friend
Future Continious - I Will be visiting my friend
Present Perfect - I have visited my friend
Past Perfect - I Had visited my friend
Future Perfect - I Will have visited my friend
Present perfect continuous - I have been visiting my friend
Past Perfect continuous - I had Been visiting my friend
Future perfect continuous - I will been visiting my friend
Passive voice:
Present simple passive - I am visited by my friend
Past simple passive - I was Visited by my friend
Future Simple Passive - I Will be visited by my friend
Present continious Passive - I am being visited by my friend
Past continious passive - I was being visited by my friend
Future continious is not used in passive voice
Present perfect passive - I have been visited by my friend.
Past perfect Passive - I had been visited by my friend.
Future Perfect Passive - I will have been visited by my friend