Please explain which sentence is correct, and if possible explain it by giving some example.
i) The doctor ran a few test on me, and diagnosed me malayria.
ii) The doctor ran a few test,and diagnosed malayria in me.
secondly, some times, we come across text in which some words are written in italics for example "Indeed, a recurring 'leitmotif' throughout is the devastating impact ............."
I have written 'leitmotif' in inverted comma,actually,I read it in italics.And my italics key of my PC are not responding in this programme that's why I have written it in inverted comma, but this may be regarded as italics.
The doctor ran some tests on me and diagnosed malaria.
The doctor ran some tests and diagnosed me with malaria.
The tests that my doctor ran revealed that I have malaria.
Italics are used primarily for highlighting things. I have included a link explaining the use of italics.
Pope of the Dictionary.com Forum