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This / That / These / Those
Demonstratives (this, that, these, those) point to people, things, or ideas. They show distance (near or far) and number (singular or plural). They can be determiners (before a noun) or pronouns (replace a noun).
- Use this / these for things that are near or being introduced now.
- Use that / those for things that are farther away or already mentioned.
- Use this/that with singular nouns; these/those with plural nouns.
Learners often make predictable errors with demonstratives. Watch out for:
- Mixing singular/plural: using 'this' with plural nouns or 'these' with singular nouns.
- Incorrect verb agreement after demonstrative pronouns (e.g., 'These is' instead of 'These are').
- Confusing determiner vs pronoun: omitting the noun when a determiner is required or using a demonstrative pronoun when a noun is needed.
- Using 'this/that' with uncountable nouns in unnatural contexts without checking meaning.
Check number (singular/plural) and whether a noun is needed after the demonstrative.