Re: How to use "too"
That sentence doesn't make sense. For a start, the third person singular form of "to love" is "loves" so the sentences should be one of the following:
Originally Posted by DiamondBlueMoon
He loves his stepdaughter too.
He also loves his stepdaughter.
He, too, loves his stepdaughter.
Note that the meanings of those three sentences are not identical.
I have no idea where you have seen "a lot of sentences like 'He too love his step-daughter' ". Wherever you are seeing these kinds of sentences, stop reading that publication. It is teaching you bad English!
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.