Answer:
<em>2. There are several hundred languages in the world, but not all of them have a written form.
</em>
<em>3. Chinese is spoken by more people, but English is spoken in more countries.
</em>
<em>4. Russian is the third most spoken language in the world, and Spanish is the fourth.
</em>
<em>5. There are about one million words in English, yet people use only about ten thousand of them.
</em>
<em>6. Chinese had many different dialects, so Chinese people cannot always understand each other.</em>
Explanation:
A compound sentence is one in which two or more independent clauses are joined together by some specific conjunctions. These conjunctions are also known as coordinating conjunctions, "for, and, nor, but, or, yet, so" (FANBOYS for short).
Now, the given sentences in the numbered list will be changed into compounds sentences as follows-
<em>2. There are several hundred languages in the world, but not all of them have a written form.
</em>
<em>3. Chinese is spoken by more people, but English is spoken in more countries.
</em>
<em>4. Russian is the third most spoken language in the world, and Spanish is the fourth.
</em>
<em>5. There are about one million words in English, yet people use only about ten thousand of them.
</em>
<em>6. Chinese had many different dialects, so Chinese people cannot always understand each other.</em>
