Ok so basically words r either feminine or masculine. So if it has la, las, or una it’s feminine and if it has un, el, or los it’s masculine. La and el is used for definitive singular. Los and las is used for definite plural. Una and un is used for indefinite singular. Unas and unos is used for indefinite plural. If ur making a word plural u add s if it ends with a vowel and es if it ends with a consonant. For example las mesas it’s la Mesa (definite singular) una Mesa (indefinite singular) unas mesas (indefinite plural).
For el profesor (going across) it’s los profesores, un profesor, unos profesores. I hope this helped.
Exposed by the author of the text: Lyon sports measurement center on sports shoes
Goods is a physical commodity.
Services is a process or activity.
Examples of goods:bathtub,chair,bed
Examples of services:police,doctor,soldier
A. Aperitivos
If you go to a Mexican restaurant they always gonna gave you nachos before you order the main dish