Welcome to Grammar in Use: Making Connections!

In this chapter, we are going to learn how to connect our thoughts to show cause and effect. Have you ever wanted to say that something is "so good" that you just had to tell everyone? Or talk about what you will do "if" it rains tomorrow? By the end of these notes, you will be able to build complex sentences like a pro!

These skills are part of the CEFR A2 level requirements for Mathayom 3 students. Mastering these will help you express your opinions and describe situations more clearly in your exams and daily life.

1. If-Clauses (Conditionals)

An If-clause is used when one action depends on another. It is like a "deal" or a "rule." We usually divide the sentence into two parts: the if-clause (the condition) and the main clause (the result).

A. The Real Present (Zero Conditional)

We use this for facts, habits, or things that are always true.

The Formula: \( \text{If} + \text{Present Simple} , \text{Present Simple} \)

Example: If you heat ice, it melts.
Example: If I get a headache, I go to the school nurse.

B. The Future Possibility (First Conditional)

We use this for things that might actually happen in the future if a condition is met.

The Formula: \( \text{If} + \text{Present Simple} , \text{will} + \text{Verb (infinitive)} \)

Example: If it rains tomorrow, I will stay at home.
Example: If you study hard, you will pass the English exam.

Quick Tip: You can swap the order of the sentence! If the "If" comes first, use a comma. If the "If" is in the middle, no comma is needed.
"I will stay at home if it rains." (No comma!)

Key Takeaway: Use If-clauses to talk about conditions. For future plans, remember: If + Present, then Will + Verb.


2. So...that

We use so...that to show that an adjective or adverb is so "extreme" that it causes a specific result.

The Formula: \( \text{Subject} + \text{Verb} + \text{so} + \text{adjective/adverb} + \text{that} + \text{result clause} \)

How to use it:
1. Pick a quality (adjective): hungry.
2. Add "so" before it: so hungry.
3. Add the result: that I ate two plates of rice.

Example (Self): I am so tired that I fell asleep in class.
Example (Weather): The weather is so hot that we want to go swimming.

Did you know? In informal speaking, people sometimes skip the word "that," but for your school exams, it is safer to keep it in!


3. Such...that

Such...that has the same meaning as "so...that," but we use it with nouns (people, places, or things).

The Formula: \( \text{Subject} + \text{Verb} + \text{such} + (a/an) + \text{adjective} + \text{noun} + \text{that} + \text{result clause} \)

How to spot the difference:
- Use so + adjective (so fast)
- Use such + noun (such a fast car)

Example (Food): It was such a delicious meal that I asked for the recipe.
Example (Travel): It was such a long journey that we all felt exhausted.

Key Takeaway: Use so for "how" something is (adjectives). Use such for "what" something is (nouns).


Common Mistakes to Avoid

Don't worry if this seems tricky! Even native speakers make mistakes here. Watch out for these:

  • The "Will" Trap: Never put "will" inside the if-part of the sentence.
    Wrong: If it will rain...
    Right: If it rains...
  • So vs. Such: Remember that "such" needs a noun.
    Wrong: The movie was such funny that I cried.
    Right: The movie was so funny... OR It was such a funny movie...
  • Punctuation: Don't forget the comma if your If-clause starts the sentence!

Quick Review Box

If + Present, Will + Verb = Future possibility.
So + Adjective + That = Extreme quality + Result.
Such + (a/an) + Adjective + Noun + That = Extreme thing + Result.


Practice with Real-World Topics

Try completing these sentences in your head based on the topic families in your syllabus:

1. (Environment) If we don't recycle plastic, the oceans (will become) dirty.
2. (Health) The soup was so salty that I couldn't drink it.
3. (Education) She is such a smart student that she finished the test in ten minutes.

Great job! You are now ready to use complex sentences to describe the world around you. Keep practicing, and your English will continue to improve!