LC
Indirect Command
Sometimes an ut clause simply expresses a command, wish, desire, hope, etc., without any strong meaning of purpose or result.
A negative indirect command clause is formed with ne.
Mihi persuasit ut venirem. -> He persuaded me that I come (to come).
Me monuit ne venirem. -> He warned me that I not come (not to come).
Ab eis petivit ne se vulnerarent. -> He begged them not to wound him.
Fear Clause
Fairly narrow niche as far as common constructions using the subjunctive go, requiring (as they do) an introductory verb meaning "to fear"- namely timeo, the passive of terreo, the deponent verb vereor and possibly roundabout expressions using nouns: it is rather odd that the construction is one of the more complicated to explain how it "works".
There's the sense of being afraid to do something:
Puella timebat aquam intrare. -> The girl was afraid to enter the water.
The fear over things that may happen (in the future) but haven't yet:
Mater timebat ne liberos servare non posset. -> The mother was afraid that she wouldn't be able to save her children.
Fear over things that might already have happened:
Agricola timet ne equus ex agro erraverit. -> The farmer is afraid that his horse has wondered out of the field.