In لَا تُصَاحِبْ, لَا تَخُنْ, and لَا تَنْتِفُوا, لَا prohibits an action. By contrast, the lām of command in لِيُؤَذِّنْ and وَلْيَؤُمَّكُمْ directs that an action be performed. These constructions work differently and should not be translated alike.
أَدِّ, كُنْ, and ازْهَدْ address one person; أَعْطُوا addresses a group. Recognizing the addressee helps avoid confusing the sense of the whole narration.