First of all, you should gain an understanding of their level of English, many non-native Speakers actually have a native level of English.
If you feel that your speaker struggles to understand you, you should speak clearly, not use slang or short forms (cannot rather than can't, going to rather than gonna) and use more simple words.
Answer:
Please put the sentence so that I can answer.
Explanation:
Because, without a sentence how is one to answer a question missing pieces of information?
Answer:
From the Mississippi River in the east to the Rocky Mountains in the west.
Explanation:
The confederate states won