گرامر زمان حال کامل

Present Perfect

The almost magical transformation from caterpillar to butterfly has fascinated humans for thousands of years.

What has fascinated humans for thousands of years? The transformation from caterpillar to butterfly has fascinated humans for thousands of years.

While the butterfly has symbolized transformative change, the caterpillar has reminded us of hidden potential.

What has the butterfly symbolized? The butterfly has symbolized transformative change.

What has the caterpillar reminded us of? The caterpillar has reminded us of hidden potential.

Who could ever have imagined that such an earthbound, worm-like creature could transform so effortlessly into a creature of flight, color, and grace?

You probably have known that a caterpillar grows a shell and, after about a month, out pops a butterfly. This shell has been called a chrysalis, and what happens inside a chrysalis might not be what you expect.

What has the shell been called? The shell has been called a chrysalis.

You might have thought that the caterpillar sprouts wings, but if you were to cut a chrysalis open, all you would see is liquid goo. There would be no sign of the caterpillar whatsoever. The eyes, the antenna, the legs, and the organs have all seemed to disappear.

Has the goo seemed to disappear? No, the goo hasn’t seemed to disappear. Have the eyes and the antenna seemed to disappear? Yes, the eyes and the antenna have seemed to disappear. What else has seemed to disappear? The legs and the organs have also seemed to disappear.

They have seemed to melt into a milky liquid. And somehow out of that liquid a transformation has happened.

What kind of liquid have they seemed to melt into? They have seemed to melt into a milky liquid. Has a transformation happened out of that liquid? Yes, a transformation has happened out of that liquid.

This has led many early scientists to believe that the caterpillar has to completely die for the butterfly to be born.

A man named Jan Swammerdam has cut open a caterpillar and has found thin transparent wings and antennae rolled up within the caterpillar.

Who has cut open a caterpillar? Jan Swammerdam has cut open a caterpillar. What has he found? He has found thin transparent wings and antennae rolled up within the caterpillar.

He has discovered that these ghostly wings and antennae have become part of the caterpillar’s shell.

What has he discovered? He has discovered that these ghostly wings and antennae have become part of the caterpillar’s shell.

He has discovered the link between the caterpillar and the butterfly. The butterfly’s future self has been hiding all along inside the caterpillar.