the usage of the insidious small word "as".

[vil]

Dear teachers,

Would you be kind enough to explain to me the usage of the insidious small word “as” in the following sentences?

Do as I ask you.
Her hair is as black as night.
Jane liked to sing as she was sewing or knitting.
Did you see anybody as you came in?As the fog thinned, the outlines of the trees became more clear.
The children must go home as it is late.
Everybody praised George as he had done the work well.
Brave as he is, he dared not jump from the roof.
Late as it is, we must finish our account by to-morrow.

Thank you for your efforts.

Regards,

V.

[bhaisahab]

Do as I ask you. Do like I ask you.
Her hair is as black as night.
Jane liked to sing as she was sewing or knitting. Jane liked to sing while she was sewing or knitting.
Did you see anybody as you came in? Did you see anybody while you were coming in.
As the fog thinned, the outlines of the trees became more clear. While the fog thinned, the outline of the trees became nearer.
The children must go home as it is late. The children must go home because it is late.
Everybody praised George as he had done the work well. Everybody praised George because he had done the work well.
Brave as he is, he dared not jump from the roof. Brave though he is, he dared not jump from the roof.
Late as it is, we must finish our account by to-morrow. Even though it is late, we must finish our account by tomorrow.

Here are my suggestions.