The table below shows the forms and uses of the zero and first conditional. Read the information given and then move on to the questions on the next page.
| Type | Usage | Form | Example |
| Zero | To talk about conditions which are always true and scientific facts
(Can also be used to give instructions) |
if + present simple… + present simple | If people take regular exercise, they improve their health. |
| First | To predict likely events in the future (the speaker/writer believes that there is a big chance that the situation will occur) | if + present simple… + will + base verb | If we protect the environment now, future generations will benefit. |