Word by Word Analysis

نَّحْنُ خَلَقْنَـٰهُمْ وَشَدَدْنَآ أَسْرَهُمْ ۖ وَإِذَا شِئْنَا بَدَّلْنَآ أَمْثَـٰلَهُمْ تَبْدِيلًا 28

We have created them and strengthened their forms, and when We will, We can change their likenesses with [complete] alteration.