FOUR RHYMING RIDDLES

1)
I've seen you where you never were,
And where you never will be;
And if you would be so inclined,
You could say the same of me.

2)
Goes to the door, but doesn't rap,
Goes to the window, but doesn't tap;
Though uninvited, a welcome guest,
When long without him, we are hard-pressed.

3)
It has neither top nor bottom,
It has no beginning or end;
Yet how it doth bind us,
Earthly women and men.

4) Credit: Robert B. Brough (1828-1860)

Cut off my head, and you'll quickly see
Something disliked by you and by me;
Cut off my tail, and then it is clear
The past of a verb will quickly appear;
Cut off my head and my tail also,
You'll have a conjunction then I know.
Whole, I'm an insect, feared when seen,
Dreaded at picnics in meadows green.
To critics, to acquaintances, to intimate friends,
My name a most delicate piquancy lends,
When they smile in their guile, and hiss as they sing,
And hide under flatteries a venomous sting.

Answers:
1. reflection in a mirror
2. sunlight
3. wedding ring
4. wasp/asp/was/as