Generalizations are simple statements of fact.
If in the present, both clauses take the simple present tense.
Generalizations frequently use a plural subject.
(“If” may be replaced with “when” without changing the meaning.)
- If it snows, the sidewalks are slick.
- (When it snows, the sidewalks are slick.)
- The days are longer if it’s summer.
- (The days are longer when it’s summer.)
- If the sun shines, the temperature rises.
- (When the sun shines, the temperature rises.)
Generalizations can also be placed in the past using the simple past tense.
- The sidewalks were slick if it snowed.
- (The sidewalks were slick when it snowed.)
- If it was summer, the days were longer.
- (When it was summer, the days were longer.)
- The temperature rose if the sun rose.
- (The temperature rose when the sun rose.)