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This is my question. " List of items " or " Lists of items " .Another type of example is " Diffrent kinds of products " or " Diffrent kind of products " .What is the diffrences between these two sentence ?
Comments  
List of items-- 1 list.

Lists of items-- more than 1 list.

Different kinds of products-- More than 1 kind

Different kind of product-- 1 kind
why the 4th sentence the product has no "s " added ? Can i say " Different kindof products " as like the 1st sentence ?But the first two sentence is acceptable ? Why ah Mister Micawber ?What is the diffrence between 3rd and 4th sentence ? Can show some example.Example 1 kind and more than 1 kind ?Emotion: wink
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Let's work on your basic English first:

Why does 'product' in the 4th sentence have no "s" added? Can I say "Different kind of products" like the 1st sentence? But the first two sentences are acceptable? Why, Mister Micawber? What is the difference between the 3rd and 4th sentences? Can you show me some examples of 1 kind and more than 1 kind?

Do not put a space before a question mark.
Try to write careful English instead of using emoticons.
Thanks Mister Micawber for guiding the correct format of writing.So, can you tell me on how to solve as I wrote above? Thank you.
Thanks, Mister Micawber for guiding me in the correct written format. So, could you answer the questions I wrote above? Thank you.

As soon as we solve your writing problems we'll move on to unimportant things like kind of product and kinds of products.
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I hope other people can help me to solve these questions.By the way, thank you very much for your great explanations, Mister Micawber.
Very good! Now to your questions:

Why does 'product' in the 4th sentence have no "s" added?-- For consistency with the other singular ('kind'), since only one different product is discussed.

Can I say "Different kind of products" like the 1st sentence-- You can, but careful writers would not.
But the first two sentences are acceptable? Why, Mister Micawber?-- Because each list has more than one item: one list of several items, several lists of several items each.

What is the difference between the 3rd and 4th sentences-- I have already said: more than 1 kind (#3), and 1 kind only (#4).

Can you show me some examples of 1 kind and more than 1 kind-- 'Proton is one kind of autombile.' 'Toyotas and Fords are two kinds of automobiles.'
Finally, I got it! Thank you very much Mister Micawber for your great explanations.
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