The English language helps to communicate thoughts and ideas in a structured manner. Often in conversations statements are made and arising from these statements questions may be asked. It is useful to learn to convert statements into questions to enrich the quality of conversation.
If I make a statement, 'Roger Federer is the best tennis player' to my friend and he responds 'Is Roger Federer the best tennis player in the world?' My friend has responded by converting my statement into a question.
In order to convert a statement into a question you need to put the verb at the beginning of a sentence and add a question mark at the end. Sometimes the verb may have to be changed and an additional word added. For instance, 'Roger Federer won the Wimbledon tournament in 2012' is a statement and when converted into a question reads 'Did Roger Federer win the Wimbledon tournament in 2012?' Note that we have added 'Did' and changed 'won' to 'win'.