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. In only when , there is a sense of urgency, a slightly more 'involved' writing.

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. Which is grammatically correct? I can only do so much in this time. Or i can do only so much in this time. I am from bangalore and people here tend use the word only to emphasise something in a sentence.

I can only do so much in this time. Or i can do only so much in this time. I am from bangalore and people here tend use the word only to emphasise something in a sentence. We are getting that only printed. What is the proper way to put it?