This is more about the suggestion I am asking here. Please share your ideas/experience which will help me. I am working as a project manager and want to present most of the time about project or technology. I used mixed tenses for the same kind of information which suits sometimes correctly and interpreted the meaning sometimes incorrectly.
The important thing to remember is not to mix tenses in the same context. But using the various tenses when each is appropriate is not something to fear. Consider:
This paragraph romps through all the tenses I could stuff into a few sentences, but each is used to make a necessary point. There is no confusion about what happened, is happening, or is expected to happen.
Tenses can be mixed incorrectly, however. Consider the second sentence in this example:
You might hear people mix tenses like this all the time in spoken speech, and the meaning would be understood. But even though a reader or listener might be able to figure out your meaning, your job as a writer is to make your meaning clear and immediate. In this case the second sentence should be improved to something like the following:
You will notice that there is still a slight mixing of tenses here. " ... I went home ... because I don't want to catch his cold." There is nothing wrong with this mixture, because I am describing an action taken in the past to prevent a continuing danger. A similar construction would be: "I refused dessert because I am dieting."
In sum, use tenses freely and mix them when you must, but make sure to be consistent and not arbitrary. Switching in and out of tenses capriciously breaks the flow and obstructs comprehension.