1)
Does he make the Kli in his hand?
1.
Rashi: The verse must be rearranged. What he makes from clay was broken in his hand while it was still moist.
2)
What is the significance of the Kli breaking?
1.
Malbim: There are two parables. (a) The first Kli was ruined and totally nullified. (b) The ruin was temporary. The potter made another Kli, like he wanted to make initially - in the same mold.
3)
What is the grammatical form of "Yashar"?
1.
Radak: It is a verb in past tense, for there is a Kamatz under the Yud, and a Patach under the Shin.