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  Type 1 Conditional Type 1 conditionals  refer to a  possible condition  and its  probable result . They are based on facts, and they are used to make statements about the real world, and about particular situations. 1. Form In a  Type 1  conditional sentence, the tense in the  ‘if’  clause is the  simple present , and the tense in the main clause is the  simple future ‘IF’ CLAUSE (CONDITION) MAIN CLAUSE (RESULT) If + simple present If it  rains If you  don’t hurry Simple future you  will get wet we  will miss  the train. 2. Function In these sentences, the time is the  present or   future  and the situation is  real . They refer to a  possible condition  and its  probable result . They are based on facts, and they are used to make statements about the real world, and about particular situations. We often use such sentences to give warnings: If you  don’t leave ,  I’ll call  the police. If you  don’t drop  the gun,  I’ll   shoot ! If you   drop  that glass, it  will   break . Nobody 

  Conditional sentence type 0 This type is usually referred to as zero conditional sentences. This type of sentence is used when the results or consequences of a condition are materialized, aka explaining general truth and scientific facts. This sentence is usually in the form of the present tense with the formula: if + simple present, simple present. Example sentences :   1. If we burn paper, it becomes ash. 2. I feel sick if I eat too much. 3. If you don't brush your teeth, you get cavities. 4. When people smoke cigarettes, their health suffers. https://www.youtube.com/watch?v=0DxH6npmPbY&t=223s