placement of "now"
 

I am going to make up a few sentences.

(1) I am not now cooking lunch. I want to read a novel instead.

(2) I do not know now what my uncle is planning for my birthday.

(3) I am not doing now what you are requesting.

Is the word, now, correctly placed in these sentences? Thanks.

Re: placement of "now"
 

The problem isn't just "now" (which is flexible in its positioning) - it's the choice of verb forms, which are sometimes not possible, and the meaning. Here's a rewrite of the sentences which clarifies them :

1. I am not going to cook lunch now/yet. I want to read a novel instead.

2. I don't know now what my uncle is planning for my birthday. This means : I knew a few days ago but he's changed the plans and hasn't told me the new ones. Do you mean : I don't know what my uncle is planning for my birthday yet meaning : Up to now he hasn't told me anything.

3.I don't want to do what you asked right now, but I'll do it later