Drama Online has over 2,200 plays which you can read online. You can browse them by title, playwright, period or genre (for example, Theatre of the Absurd, Asian drama, Children’s theatre, Feminist theatre, Musical theatre, Street theatre).
From The Importance of Being Earnest, by Oscar Wilde:
Lady Bracknell: Are your parents living?
Jack: I have lost both my parents.
Lady Bracknell: Both? To lose one parent may be regarded as a misfortune — to lose both seems like carelessness.
From Waiting for Godot by Samuel Beckett:
Vladimir: Pull on your trousers.
Estragon: You want me to pull off my trousers?
Vladimir: Pull ON your trousers.
Estragon: (Realizing his trousers are down.) True. (He pulls up his trousers.)
Vladimir: Well? Shall we go?
Estragon: Yes, let’s go.
They do not move.