Language functions and focus
1 Use “can”, ”could”, ”may” and “might” to talk about permission, eg:
Can I go to Mars tomorrom, Mum?
2. object cl auses introduced by “that”, eg:
Many people believe robots will do most of our work.
3. Object clauses introduced by “if” or “whether”. eg:
It is not sure if these plants could produce water,.
4 . Express personal feeling concerning a future situation,eg:
Would you like to live on Mars , Daniel ?
