STAGE 3 ELEMENTARY (1100 Headwords)Simple passive forms More extensive use of catenative verbs-like to, decide to, etc. Infinitives of purpose- Conditional forms Modal-could(ability)Modal-can(permission)-Abstract nouns Maximum of three adjectives verbs-+noun Two adjectives + adjectival phrase- Superlative forms of adjectives-Superlative form of adjectives+ adjectival clauses-Complex sentences main clause + one subordinate clause Adverbial clauses of time Relative clauses- Adverbial clauses of comparison Adverbial clauses of reason. I work in a space station. From my office, I can see the Earth twenty thousand miles away. It floats in space like a big green and blue ball. Arthur C.Clarke tells ten strange science fiction stories. This collection of tales takes us from Earth to Venus, to Saturn and beyond.