.Write the following articles and nouns in their plural forms:

el lápiz
la nariz
el profesor
el ratón

los lápices

las narices
los profesores
los ratones

los lápices

las narices
los profesores
los ratones

To convert these singular nouns to their plural forms in Spanish, you generally follow a few rules:

1. If a noun ends in a vowel (like "el lápiz" and "la nariz"), you can typically add -s to the end to make it plural.
- Plural of "el lápiz": los lápices
- Plural of "la nariz": las narices

2. If a noun ends in a consonant (like "el profesor" and "el ratón"), you usually add -es to the end.
- Plural of "el profesor": los profesores
- Plural of "el ratón": los ratones

By following these rules, you can form the plural forms of these nouns in Spanish.