The following are subjunctive particles ( أحْرُفُ النَّصْبِ ):
أَنْ to :
أُريدُ أَنْ أُسافِرَ I want to travel.
لَنْ will not:
لَنْ أُسافِرَ I will not travel.
حَتّىin order to:
إفْرأْ حَتّى تَتَعَلَّمَ I read in order to learn.
These particles are followed by a verb in the subjunctive.
See also: