Walked is the past tense of the regular verb to walk.

The hurricane is impending.

Calm down before you hurt somebody.

The lack of knowledge of Chinese was regarded as a major obstacle for the imposition of Chinese rule, and already in 1912 the head of the Chinese government of Simao and Puer reported to the provincial government about the urgent need for developing Chinese education in Sipsong Panna (Xiao 1993: 125).