If certain conditions are met in the present, then certain other events will or may occur in the present (Type 0) or future (Type 1). Type 0 conditionals express general truths or instructions using the simple present tense in both clauses. Type 1 conditionals use the simple present in the if-clause and future forms or modals in the other clause to suggest or remind. Examples are given for each type.

1. CONDITIONAL SENTENCE
TYPE 0 & 1

2. FUNCTION
Conditional sentences type 0 and 1 can be used to express:
• General truth / facts
• Instructions
• Suggestions
• Reminder

3. STRUCTURE
Type 0
• If / when ...(Simple Present)..., ...(Simple Present).... or
...(Simple Present)... if / when ...(Simple Present)....
• If / when ...(Simple Present)..., ...(Imperative)....
Example:
• If it is windy, it gets very dusty here. (fact)
• Flowers grow well if they get enough water. (fact)
• If you feel cold, wear a jacket. (imperative / suggestion)

4. STRUCTURE
Type 1
• If ...(Simple Present)..., ...(Simple Future / Modals).... or
...(Simple Future / Modals)... if ...(Simple Present)....
Example:
• If it rains, we will need to find a shelter. (reminder / suggestion)
• If you want to be fluent, you must practice a lot. (suggestion)
• You will get into trouble if you disobey the rules. (reminder)