Form Zero Conditional sentences. 1) Jack / always / bring / flowers / when / he / come / to visit us.
Jack always brings flowers when he comes to visit us.
2) if / you / mix / red and blue / you / get / purple
3) glass / break / when / you / heat /it ?
4) if / you / not eat /you/get/thin
5) when the weather / be / nice /I/walk / to work
6) your brother / help / you / with your homework/when / he / have / time ?
7) 1/usually / read / a good book / when/I/not be / busy
8) if/plants / not get / enough water /they/ die

1) If Jack always brings flowers when he comes to visit us, this can be rewritten in the zero conditional as "When Jack comes to visit us, he always brings flowers." In the zero conditional, we use "when" instead of "if" because the action is always true or happens whenever the condition is met.

2) If you mix red and blue, you get purple. Here, the condition is "if you mix red and blue" and the result is "you get purple". This is a general statement that applies to any situation where red and blue are mixed together.

3) Does glass break when you heat it? This is a question asking about a general truth or rule. In the zero conditional, we use the present simple tense for both the condition and the result because the condition always leads to the result.

4) If you do not eat, you get thin. In this example, the condition is not eating and the result is getting thin. It is a general statement that suggests a cause and effect relationship.

5) When the weather is nice, I walk to work. This sentence describes a regular or habitual action. In the zero conditional, we use the present simple tense for both the condition and the result.

6) Does your brother help you with your homework when he has time? Here, we have a question asking about a general situation. The condition is "when he has time" and the result is "your brother helps you with your homework".

7) I usually read a good book when I am not busy. This sentence describes a regular or habitual action. The condition is "when I am not busy" and the result is "I read a good book".

8) If plants do not get enough water, they die. The condition is "if plants do not get enough water" and the result is "they die". This sentence represents a general truth or rule.

The zero conditional is used to describe general truths, facts, or rules, where the condition always leads to the result. It is often used to express scientific facts, instructions, or general knowledge.