(4) “These samples are not perfect.”

(21) Define conversion.

(22) State and illustrate the rules which condition the process of conversion.

(23) Convert, if possible, the following:

(1) “Some men practice sophistry.”

(2) “Few men know how to live.”

(3) “Some of the inhabitants are not civilized.”

(4) “All the world is a stage.”

(5) “None of my pupils failed.”

(6) “Experience is a hard taskmaster.”