I read somewhere that you should avoid using present tense -ing verbs in a past tense narrative. The example was something like: The first is better than the second. I have a sentence, I'm not sure about. In the example, the -ing verb (grabbing) was being done by the subject (Bob), but in my sentence, the -ing verb (sitting) is being done by 'her', the prepositional object. Here's another one I have a problem with. I've tried to rewrite these lines, like this: The rewrites are acceptable, but are they necessary based on a verb tense issue like in the example above?