Use no article

We do not use an article before plural or uncountable nouns to talk about something in general.

• I don’t drink milk.
• Women drive more cautiously than men.

Compare:

• I love music. 
• I loved the music at the party. 
• Children are often difficult. 
• They are a nice family. The children are very funny.

Meals

We do not use an article before the names of meals: breakfast, lunch, or dinner.

• Dinner is served at 8.
• I always have breakfast with my children.

Years, months and days

We do not use an article before names of years, months and days of the week.

• Friday is my favourite day of the week.
• I think 2020 will be an excellent year.

TV

We do not use an article with TV (when used as a broadcasting service, NOT as an appliance)

• I saw it on TV.
• I don’t watch TV.

Turn off the TV. I’ve bought a new TV.

Names of languages and school subjects

We do not use an article before the names of languages and school subjects.

• He doesn’t speak English.
• I study biology. 

Next, last

We do not use an article before next and last + time expression (when they mean before or after now).

• The meeting is next Thursday.
• I saw him last week.

Compare:

• Last year we spent one week in London.
• We really loved London. The last day we were really sad. 
• What a fantastic idea!
• Yesterday was such a horrible day!
• This is such a difficult problem!
• Thanks, you are such a good friend.