If and only if used in the same way means the same thing, except that only if is more forceful, more compelling In only when , there is a sense of urgency, a slightly more 'involved' writing If and only if is the most obligatory of the three, in which the action has been distinguished and emphasised, if, and only if it's the most forceful of the three
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Only but (also but only)
Oxford english dictionary (login required) below are some only but examples from the corpus of contemporary american english
Swap in only or nothing but for only but to see Ultimately, there is only but one choice for you, no To consume the entire pint 2 the oxford english dictionary defines but only (which can also occur as only but) as meaning ‘ (a) only, merely
(b) except only’, and comments that its use is now poetical. I can only do so much in this time Or i can do only so much in this time. The wording implies that only b matters, not c, d, e,
I will help you prepare for the meeting only if you finish your report
This implies that finishing the report is a necessary but not necessarily sufficient condition for me to help you prepare for the meeting. You should put only before a verb phrase when either (a) the verb phrase is the focussed constituent of only, or (b) when the verb phrase contains another constituent that is the focus of only Words with a focus (e.g, only, even, too, also) can go either immediately before their focussed constituent, or before any constituent that contains it. 1 there is no difference between just and only in the context of this sentence
The problem with this sentence is that neither of the constructions not just airports or not only airports cannot be used as the subject of a sentence *not just airports are part of the target customer group. The only way to avoid ambiguity is to say we are getting only that printed and to emphasize that When it's written, where only is placed can eliminate or create ambiguity
All other suggestions here so far are ambiguous to careful writers and readers
Disregard what typical native speakers think is normal in this case. When only after, only if, only in this way etc Are placed at the beginning of the sentence for rhetorical effect, the subject and auxiliary are inverted Only after lunch can you play.