Is ing a suffix?

Yes.

yes

i need to ask u a quastion do you know what a adjectives

Yes, "ing" is commonly used as a suffix in the English language. It is called a gerund-participle suffix and is used to form present participles, gerunds, and progressive verb tenses.

To determine if "ing" is a suffix, you can look at the word in question and see if it is added to the end of a verb base form. If it changes the form or function of the word into a present participle, gerund, or progressive verb tense, then it is serving as a suffix.

For example, in the word "running," the "ing" is added to the verb "run" to form the present participle, indicating the action is ongoing or in progress. In the word "singing," the "ing" is added to the verb "sing" to form a gerund, which functions as a noun in the sentence. And in the phrase "they are playing," the "ing" is added to the verb "play" to form a progressive verb tense, indicating an ongoing action in the present.

So, when you encounter "ing" at the end of a word, it is likely acting as a suffix to modify or indicate a specific form and function of the verb.