Describe the uses of 'ut'.

'ut' is used with the subjunctive to show purpose in a purpose clause, for example: "puer arborem ascendit ut milites videret", "the boy climbed the tree to see the soldiers"'ut' is used with the subjunctive to demonstrate a result in a result clause, for example: "tam ferox erat leo ut agricola timeret", "the lion was so fierce that the farmer was afraid"; when 'ut' is used in a result clause, it is accompanied in the main clause by words such as 'tam', 'so', 'tantus', 'so great', and 'tot', 'so many', which trigger the result clause.'ut' is used with the indicative to mean 'when','as','how'