zhèxiē shì shēnghuóyòngpǐn.

这 means this.

这些 means these.

So:

• 这 是 生活用品。 = This is a household item / daily-use item.
• 这些 是 生活用品。 = These are household items / daily necessities.

The extra 些 makes it plural.

Because 些 already does that job here.

In Mandarin, 些 is a special word used to indicate an indefinite plural amount: some / these / those.

So 这些 is a fixed, very common way to say these.

Compare:

• 这个 = this one
• 这些 = these

You do not say 这几个些 or add another measure word after 这些 in this sentence.

Yes. That is very common.

In this sentence, 这些 means something like these things. The noun is omitted because the context makes it clear.

So:

• 这些是生活用品。 = These are household items.

If you want to be more explicit, you can add a noun:

• 这些东西是生活用品。 = These things are household items.
• 这些物品是生活用品。 = These items are household items.

Mandarin often leaves out a noun when it is obvious from context.

是 is the verb to be when one noun phrase is being identified as another noun phrase.

Here, the structure is:

• 这些 = the subject
• 是 = linking verb
• 生活用品 = the category or identity

So the sentence means:

• These are household items.

This is different from sentences with adjectives, where Mandarin often does not use 是:

• 这些很贵。 = These are expensive.
  Not 这些是很贵.

But with a noun on both sides, 是 is normally used:

• 这些是生活用品。

Not if you want the same sentence meaning.

• 这些是生活用品。 = These are household items.
• 这些生活用品 = these household items

So without 是, it becomes a noun phrase, not a full statement.

Think of the difference in English:

• These are household items. → full sentence
• These household items → just a phrase

It is commonly treated as one compound noun meaning household items, daily-use items, or daily necessities.

It is built from:

• 生活 = life / daily life
• 用品 = articles for use / items used in everyday life

Together, 生活用品 means things used in everyday living, such as:

• soap
• towels
• toothbrushes
• detergent
• tissues

So even though you can understand the parts, learners should usually treat 生活用品 as one vocabulary item.

Because Mandarin nouns usually do not change form for singular vs. plural the way English nouns do.

In English:

• item
• items

In Mandarin, the noun often stays the same. Number is shown by context or by words like 这, 这些, 一个, 很多, etc.

So in this sentence:

• 这些 already tells you the subject is plural
• 生活用品 stays unchanged

That is completely normal in Mandarin.

This is a very important difference.

1. 这些是生活用品。
   Full sentence: These are household items.

2. 这些生活用品
   Noun phrase: these household items

Examples:

• 这些是生活用品。那些是食品。
  These are household items. Those are food products.

• 这些生活用品很便宜。
  These household items are cheap.

So the first one is a statement; the second one is just a phrase that can be part of a larger sentence.

The pinyin is:

zhèxiē shì shēnghuóyòngpǐn

Tone by tone:

• 这 zhè — 4th tone
• 些 xiē — 1st tone
• 是 shì — 4th tone
• 生 shēng — 1st tone
• 活 huó — 2nd tone
• 用 yòng — 4th tone
• 品 pǐn — 3rd tone

A natural rhythm is:

这些 / 是 / 生活用品。

You do not need to pause strongly, but 生活用品 is usually said as one unit.

One helpful point: 这些 is pronounced smoothly together, not as two isolated words.

To make it negative, put 不 before 是:

• 这些不是生活用品。
  These are not household items.

To make it a yes-no question, add 吗 at the end:

• 这些是生活用品吗？
  Are these household items?

You can also ask an information question:

• 这些是什么？
  What are these?

These patterns are very common and useful.

Yes, it is natural and grammatical.

It sounds like something you might say when:

• identifying objects
• sorting items
• teaching vocabulary
• explaining what something belongs to

For example:

• at a store
• in a classroom
• while organizing supplies at home

In casual speech, a native speaker might also say something more specific depending on context, but 这些是生活用品。 is perfectly normal Mandarin.