Q: If But neither shall they delay its breaking., can we say that "They will not delay its breaking."?

A: yes

Q: If It tells the public that all politicians ever do is quarrel--without doing much to elucidate what, if anything, they might be fighting about., can we say that "It tells the public that politicians just fight without saying what they might be fighting about."?

A: yes

Q: If You would inherit it, wouldn't you?", can we say that "It would be passed down to you, wouldn't it?"?

A: yes

Q: If Mr. Brown exists. He turned to Tommy., can we say that "He turned to Tommy with a worrying expression on his face."?

A:
it is not possible to tell