The speaker's attitudes and intentions
Can, may, must and want to
Wanting and intending
What does someone want or plan to do?
grammatical mood
معنا
Wanting and intending show what someone wishes for or plans to do. A wish need not become a plan, and a plan need not lead to action. Some languages have special verb forms for wishes or intentions; others use ordinary words and context. Past, present and future tells us when an event happens, not whether someone wants it to happen.
چطور آن را تشخیص دهید
Look for a wish, plan, willingness, or refusal, rather than just a statement that an event will happen.