The Rock Egg blog
Learn a little English every day
Short, friendly lessons on one idea at a time, with examples you can hear and a quick quiz at the end.
- 5-minute lessons
- A quiz in every post
- English and Tiếng Việt
Not sure where to start?
Take the Level Check to find out your level, then pick lessons that fit.
Find my levelGrammarA1Beginner
a, an or the? The basics in one page
When to use a, when to use an, when to use the, and when to use nothing at all.
1 min read · Oct 15, 2026Read
GrammarB1Intermediate
Used to, be used to, get used to: three phrases, three meanings
They look almost the same, but one is about the past, one is about what feels normal, and one is about change.
2 min read · Oct 13, 2026Read
GrammarB1Intermediate
Present perfect or past simple? How to choose in 10 seconds
When to use the present perfect and when to use the past simple, with examples and a short quiz.
1 min read · Sep 8, 2026Read