This document contains 13 sentences using conditional clauses with "if" to express hypothetical scenarios. The sentences describe possible outcomes or actions that would occur depending on certain conditions, such as a teacher getting angry if homework is not done, people not living long if water is wasted, and getting lost and not knowing what to do. The document uses conditional sentences to explore different "if...then" situations and the results that might happen under various circumstances.

1. 1.If Martin __________ (not-do) his homework, his teacher ________ (get)
angry with him.
2. Patrick and Mike _______ (not-come) to the party if their parents _________
(not-let) them.
3. If you ________ (help) m efor my English homework, I ______________
(help) you for your Science project.
4. People ___________ (not-live) long in the future if we __________ (waste)
water.
5. Please, _________ (call) me if you ________ (have) a problem.
6. _____ your teacher _____ (get) retired if she _______ (feel)
tired of working.
7.Mr Edison __________ (sell) his car if he ___________(need) money
immediately.
8. If my parents ____________ (can-barrow) some money from the bank, they
____________ (buy) a new house.
9.What ______________ (happen) if you __________(fail) your final exams.
10. If Lisa ___________ (not-hurry), we ___________ (be) late for the
conference.
11. If it _______ (rain) tomorrow, John _______ (stay) at home.
12. ______ Maria ______ (join) the gym if she ___________ (put
on) weight?
13. What ________ I _____ (do) if I ______ (get) lost?