Grammar Interactive Practice
Choose a topic and start practising.
Choose a topic and start practising.
1. If the Earth (stop) spinning, one side (always be) in darkness.
2. If the polar ice-caps (melt) completely, sea-levels worldwide (rise) by about 60 metres.
3. If we (recycle) more household waste, there (be) less damage to the environment.
4. If an astronaut (fall) into a black hole in space, what (happen) ?
5. If people (not stop) using cars so much, the country’s roads (eventually grind) to a standstill.
6. What (happen) when the world’s supplies of oil (run out) ?
7. If human beings (finally start) living on the Moon, they (need) to produce water artificially.
8. If there (not be) any money (the world be) a better place?
9. If we (not stop) over-fishing the world’s oceans, many species (become) extinct.
10. If everyone in the world (jump) up and down at the same time, there (be) no measurable effect (apart from 6.5 billion footprints).
© MEG Advanced U10Ex05
If all the people on Earth 1) (DISAPPEAR) tomorrow, nature 2) (BEGIN) to reclaim the planet. For a start, if people no longer 3) (POLLUTE) the atmosphere, the air 4) (SOON BECOME) clean again. If there 5) (BE) no people to maintain buildings, they 6) (SOON BEGIN) to decay, but more solid parts 7) (TAKE) thousands of years to disappear. In general, if the 6.5 billion humans no longer 8) (COMPETE) with other species on Earth, most species 9) (BENEFIT).
For example, if humans no longer 10) (CATCH) fish, the numbers of fish worldwide 11) (EVENTUALLY INCREASE). However, if humans 12) (VANISH) from the Earth, endangered species of animals 13) (NOT NECESSARILY RECOVER), as some are already too few in number. Some endangered species 14) (HAVE) greater difficulty surviving if no humans 15) (TAKE) the trouble to protect them from other species.
Even if we no longer 16) (POISON) the planet, several decades 17) (GO BY) before all dangerous chemicals 18) (DISAPPEAR). And even if the burning of fossil fuels 19) (CEASE) tomorrow, the oceans 20) (NOT ABSORB) all the CO2 in the atmosphere for thousands of years.
In the end, though, if alien visitors 21) (LAND) on the Earth in 100,000 years time, they 22) (FIND) no signs that an advanced civilization had ever lived here.
© MEG Advanced U10Ex.04
1. We didn't know we were going to the lake. We would TAKE / HAVE TAKEN warmer clothes.
2. In your shoes, I wouldn't ARGUE / HAVE ARGUED with him yesterday. He's still your boss.
3. I didn't realise it mattered so much to you. I would DO / HAVE DONE it much earlier.
4. I don't think anybody would MIND / HAVE MINDED meeting at the café tomorrow.
5. Last month he wouldn't SPEAK / HAVE SPOKEN about Anna like that.
6. We would STAY / HAVE STAYED a bit longer, but we have an early morning tomorrow.
7. I would GO / HAVE GONE on that trip with you, but I had to finish my project.
8. I wouldn't WORRY / HAVE WORRIED about it now. Things will sort themselves out soon.
9. I would BRING / HAVE BROUGHT my laptop, but you didn't say you needed it.
10. It would BE / HAVE BEEN better for you to check the car twice a year.
11. If I had known there would be no electricity, I would STAY / HAVE STAYED in bed longer.