This grammar sheet discusses the use of "this" and "these" with singular and plural nouns. It provides examples of asking and answering questions using "this" and "these" with singular nouns like "iPad" and plural nouns like "scissors". It also discusses regular and irregular plural forms for nouns as well as some nouns that are always plural, like "scissors". The sheet reminds readers that some nouns do not need an "s" to be plural and are irregular plurals, and that nouns ending in "y" preceded by a vowel only add an "s" while those ending in "y" preceded by a consonant add "ies".