Each conditional sentence has an if clause, and a main clause.

每件都有 if 子，主。

A Time Clause can follow a main clause or be in front of a main clause.

时间状语从可以跟在主后面，也可以放在它前面。

We can call this sentence the main clause.

我们可以称这子为主。

The main Clause contains would, could, might, followed by the verb.

主包含 would，could，might，后面跟动词。

The main Clause tells us the possible results of the situation.

主告诉我们这种情景的可能的结果。

The main clause is " I read Tony's email" .

主是" 我阅读了托尼发来的电子邮件" 。

So, conditional sentences have two parts, the conditional clause and the main clause.

件有两部分，件从主。

It's because she started the sentence with " because" and it lacks a main clause.

因为她的子以“because”开头，缺乏主。

One is in the if clause, and one is in the main clause.

在 if 子中，在主中。

Either the main clause or the conditional clause can be at the beginning.

主或件都可以位于首。

The main Clause is there would be a lot less waste in the world.

主是世界上的废品就会少很多。

Conditional sentences consist of two parts: the conditional clause and the main clause.

件由件从主两部分组成。

It has two parts: the condition (if clause) and the result (main clause) .

件（if 子）结果（main 子）。

Sorry to interrupt, but you didn't explain what a main clause is.

抱歉，打断下，你还没解释什么是主呢。

A main clause is a complete sentence, like, " I ate breakfast."

主是完整的子，比如“我吃早餐了。”

That means we use them to connect subordinating clauses to the main clause of a sentence.

那是指我们用它们将子的从主连起来。

A subordinating clause is a part of a sentence that adds additional information to the main clause.

从是子中为主添加附加信息的部分。

We use if and past perfect, and then would have and past participle in the main clause.

我们使用 if 加过去完成时， 然后主中是 would have 加上过去分词。

The conditional clause tells you the condition and the main clause tells you the result of that condition.

件告诉你件，主告诉你件的结果。

It means we have the future simple for the main clause, if the present simple for the condition.

这表示主用般将来时，if 件用般现在时。