How you do a sentence for board?

Answer 1

YOu didn't say which meaning of the word you want. If you mean a wooden board, you can say "I need one more board to build my bookshelf." If you mean a board as in board of directors of a business, you can say "The school board voted to allow students to wear jeans and t-shirts to school." You could also use the word as a verb, and say "We need to board the train now, before it leaves."

Answer 2

A sentence for board could be: "I wrote notes on the board during the lecture."