1. If /I/be/you,I/plant/flowers/garden.
=> If I were you, I would plant vegetables in the garden.
2.more/tourist/come/here/if/beach/be/cleaner.
=> More tourists would come here if the beach were cleaner.
3. what /happen/if/there/be/no/car/world ?
3. What would happen if there were no cars in the world?
4. how/you/feel/if/you/get/good mark/test?
=> what would you feel if you got good mark in the test