"Because 'it' is neuter gender."
"Couldn't we say, 'The kitten might have been glad if it had known it was not going to be drowned'?"
"Ye—es," Miss Dearborn answered hesitatingly, never very sure of herself under Rebecca's fire; "but though we often speak of a baby, a chicken, or a kitten as 'it,' they are really masculine or feminine gender, not neuter."
Rebecca reflected a long moment and then asked, "Is a hollyhock neuter?"
"Oh yes, of course it is, Rebecca"
"Well, couldn't we say, 'The hollyhock might have been glad to see the rain, but there was a weak little hollyhock bud growing out of its stalk and it was afraid that that might be hurt by the storm; so the big hollyhock was kind of afraid, instead of being real glad'?"
Miss Dearborn looked puzzled as she answered, "Of course, Rebecca, hollyhocks could not be sorry, or glad, or afraid, really."
"We can't tell, I s'pose," replied the child; "but I think they are, anyway. Now what shall I say?"
"The subjunctive mood, past perfect tense of the verb 'to know.'"
"If I had known "If we had known
If thou hadst known If you had known
If he had known If they had known.