Revision of lessons 19 – 23
Lesson 19 – modal verbs
I must go / I needn't go / do you have to go?
I should stay / I shouldn't stay / should I stay?
I may go there / I mustn't go there / may I go there?
Lesson 20 – passive
Our office is cleaned once a week.
The bridge was built in 1935.
Lesson 21 – present simple & present continuous
I'm going home.
I want to go home.
Lesson 22 – past continuous
I was sleeping all day.
They were studying hard for the exam.
Lesson 23 – questions
What are you talking about?
Who called last night?