First Conditional + unless — The Day the Sun Disappears
Grammar: First conditional with modals (can, may, might, should) and unless
Free ESL grammar exercise on first conditional + unless themed around the day the sun disappears. Printable worksheet from classplan.ai.
What's on this worksheet
A Level 3 (intermediate) ESL grammar exercise on science, practising first conditional with modals (can, may, might, should) and unless. The worksheet has a short reading excerpt, a grammar reference and graded practice items.
From the reading
If you stand under a tree, you can see hundreds of tiny crescent shapes on the ground. Safety is extremely important. Unless you wear certified eclipse glasses, you should not look directly at the Sun.
Grammar
- First conditional
- Use if + present simple in the condition clause. If you miss this eclipse, you will wait until 2090.
- Modals instead of will
- Replace will with can, may, might, should to show certainty or advice. If the sky is clear, you might see Venus.
Sample items
- If you ______ (travel) west, you can see 97% coverage.
- ______ you wear eclipse glasses, you should not look at the Sun.
- If the temperature drops, colours ______ (may / fade).
Subscribe to access the full exercise
View Plans