"ought only to be" is correct and can be used in written English.
It is typically used to express a strong recommendation or moral obligation for something to occur in the present or future. For example: - Students ought only to be assigned as much homework as they can reasonably complete in a day. - We ought only to be concerned about our own actions, not the actions of others. - The resources in this park ought only to be used for educational purposes, not for commercial gain.
The Australian side were coltish in their warm-ups, confident that wicket-taking ought only to be a matter of time and the Ashes would be theirs.
He deduced from the principle of utility that, since all punishment involves pain and is therefore evil, it ought only to be used "so far as it promises to exclude some greater evil".
The implications of such terminology are clear: politics ought only to be conducted and analysed by the professionals – either the politicians and their advisers or we who are paid to scrutinise and report their words and ideas.
Perhaps the clue comes when Carruthers suggests that this "Hormone of Kings – King of Hormones" ought only to be given to menopausal women in low doses, in case their libido "may become excessive".
In "The Righteous Mind: Why Good People Are Divided by Politics and Religion," the social psychologist Jonathan Haidt argues that recent research bolsters David Hume's famous verdict: "Reason is, and ought only to be the slave of the passions, and can never pretend to any other office than to serve and obey them".
"Reason is and ought only to be the slave of the passions and may pretend to no office other than to serve and obey them," George said, paraphrasing Hume, just as he does in seemingly every essay or lecture he writes.
This presumes that the kinds of subjects that are less quantifiably measured such as the humanities or abstract sciences are less valuable and that funding in the future ought only to follow that which can be quantified.
"Your eyes ought not only to be dry, but glad.
According to this principle, the Copyright Act ought not only to be interpreted with an eye to the internal coherence of its own scheme; it must also not be interpreted in a fashion which is inconsistent with theTrade-marks Act, R.S.C. 1985, c.
Whenever it is necessary to exempt any part of the government from sharing in these common burthens, that necessity ought not only to be palpable, but should on no account be exceeded.
In 1945, reviewing his book "Teacher in America," The New Yorker said that "everybody in the teaching profession ought to read Mr. Barzun, if only to be able to argue with him".
