|
Tense |
Active |
Passive |
|
Present |
They
discover new machines. |
New machines
are discovered.
|
|
Present Continuous |
They
are discovering
new machines. |
New machines
are being discovered. |
|
Present Perfect |
They
have discovered new machines. |
New machines
have been discovered. |
|
Past |
They
discovered new machines. |
New machines were discovered.
|
|
Past continuous |
They
were discovering
new machines. |
New machines
were being discovered |
|
Past Perfect |
They
had discovered
new machines.
|
New machines
had been discovered. |
|
Future |
They
will discover
new machines.
|
New machines
will be discovered.
|
|
Modals |
They
can discover
new machines. |
New machines
can be discovered. |
