Remember!!! Conditionals have two parts: An if clause and a main clause. When the if clause comes first, we use a comma between the two clauses. When the main clause comes first, we don't use a comma.
Example: -------main clause-------- ------If clause----- Person+ verb+If +person+verb+complement it breaks If you drop an egg. -------If clause-------- ------main clause----- If +person+verb+complement+ , +person+ verb If you drop an egg , it breaks .
The zero conditional is used: a) for instructions: If you select reverse gear, the car goes backwards. If the camera is on, a red light appears. How to use the 0 Conditional?
b) for general truths: If he has no money, he doesn't go out. Linn always says hello when / if he sees you. * If has the same meaning as when here*
In both, if clause and main clause, we use the Present Simple Tense. And it expresses facts that are always true
Form: if + present simple present simple If you press the button, the machine switches off . or present simple if + present simple The machine switches off if you press this button.
She doesn't get some money If she doesn't work hard Present simple negative sentence In this case we use the negative auxiliaries of Present simple tense don't or doesn't + infinitive verb.
Practice: Put the verbs into the correct tense. 1. Water (freeze) if the temperature (fall) below zero. Water freezes if the temperature falls below zero.
2. If he (be) angry, his face always (go) bright red. 3. If you (put) your money in a savings account, you (get) ten per cent interest. 4. If the microphone (be not) working, you (can not) hear what he's saying.
5. The radio (not work) if the batteries (be) flat. 6. If there (be) only a few students, we usually (close) one of the classes. 7. The machine (not work) if it (have not) enough oil.
Material created by Teacher Danitza Lazcano Flores Teacher of English Master in Education Educational Counselor