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40. If you go out without your umbrella, you will get a bad cold.
41. If you talk in the class, the teacher will punish you.
42. If you are careless, you'll break the vase.
43. If you don't try to learn more, you will fail the exam.
44. If you don't go to school on time, the teacher will shout at you.
45. If you are not careful, you will fall over the rocks.
46. If he does morning exercise, he will have a good health.
47. If we recycle, we'll save natural resources.
48. If he works hard, he can improve his pronunciation quickly.
49. If there isn't water, plants will die.

50. If you work too much, you will feel tired.