" researchers have still to decide whether smell is one sense or two- one responding to odours proper and the registering odourless chemicals in the air. " Can I ask you guys why it's not still have to in this sentence ?

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    Still can go in either position but still have to is much more common. Have still to can sound quite stiff and old-fashioned but it is still used. There is a slight nuance in that they still have to X means they have to X and they haven't yet, whereas they have still to X can just mean they haven't yet X (like they have yet to X, which doesn't imply any obligation at all). In this context there isn't really any difference between those meanings and I would say it's just a question of style. – Minty Apr 19 at 13:53

It's not "still have to" because, in this case, the placement of still is optional; it can go before or after the verb.


My guess the rule is it goes before the verb, but still makes sense when used after. It's like six of one and half a dozen of another.

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