In or into?

into. Use 'in' for a location; use 'into' for an action.

I put them into the soup.
They are already in the soup.

Please note, however, that native speakers often say 'in', especially with 'put'.

In this case, the verb add requires the preposition to:

Add milk to the mixture before heating it.

That's OK, too, Gustave, but 'to' is not required; it is merely one valid option here. Ms Google says:

4,980,000,000 results - add * into
20,920,000,000 results - add * to

Hi Mister Micawber!

I didn't mean to contradict you at all.

Both Into and in sounded a little strange to me because I've learned to always use to with add, and the Longman Dictionary of Contemporary English doesn't give us another option for prepositions, except when it comes to phrasal verbs. So, I thought our friend just wanted to know the right or

thank you !

I want to ask more,

in A. is "pepperS", in B. is pepper.

Should we consider this factor?

Thanks again!

To my way of thinking, it doesn't make any difference whether you add something solid or just powder to your food. The sentence remains the same.

Just to make things a little more confusing, I'd like to say that I've found the following example sentences here: