haiku practice

[burrealist]

I looked at them all. There are four that I have a question about.

For inspiration, here are some Issa haiku that were translated by Robert Hass:

This first one is my favorite haiku:

The world of dew
is the world of dew.
And yet, and yet ... 
I like this one, too.

Her row veering off,
the peasant woman plants
toward her crying child.
I also like this one.


face of the spring moon-
about twelve years old
I'd say.


Mosquito at my ear—
does he think
I’m deaf? 


All the time I pray to Buddha
I keep on
killing mosquitoes.


Napped half the day;
no one
punished me!
The four I italicized: I don't understand why the last line of each cannot work just as a completion of all second lines. Haiku becomes so confusing when I feel that some lines aren't complete, so what makes them relevant?