أَدْرُسُ كَيْ أَنْجَحَ — أَدْرُسُ لِأَنْجَحَ
Both express a goal, but the textbook treats kay as an overt governor and purpose-lām as followed by understood an.
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Kay and Purpose-Lām
The Subjunctive Imperfect and Its Governors
أَدْرُسُ كَيْ أَنْجَحَ — أَدْرُسُ لِأَنْجَحَ
Both express a goal, but the textbook treats kay as an overt governor and purpose-lām as followed by understood an.