Prior to 1792 those who wanted to wear the kilt in the lowlands or Britain had to join the British army. The reason being that because of the swift and competent movements of the Highlands armies, the English were afraid that if they let anyone wear the kilt it would spark the idea of revolution.

就目前结构而言，第二个句子是错误的，因为句首大写字母到句末的句号之间，没有一个限定动词作谓语的主谓结构，而只是一个独立主格结构。改正的方法有二：1 将the reason改为小写，其前用逗号，则独立主格结构作前一句话的状语（补充说明）。2 将being改为was, 使其成为一个独立的句子。

1 Prior to 1792 those who wanted to wear the kilt in the lowlands or Britain had to join the British army，the reason being that because of the swift and competent movements of the Highlands armies, the English were afraid that if they let anyone wear the kilt it would spark the idea of revolution.

2 Prior to 1792 those who wanted to wear the kilt in the lowlands or Britain had to join the British army. The reason was that because of the swift and competent movements of the Highlands armies, the English were afraid that if they let anyone wear the kilt it would spark the idea of revolution.