Page 174 - Basic English Usage

233 176

After ought, we use the infinitive with to. (This makes ought different
from other modal auxiliary verbs.)
You ought to see a dentist.

Obligation
We can use ought to advise people (inciuding ourselves) to do things:
to tell people that they have a duty to do things; to ask about our duty.
The meaning is similar to the meaning of should (see 294); not so strong
as must (see 208).
|
What time ought to arrive?
{ really ought to phone Mother.
People ought not to drive like that.
Deduction
We can use ought to say that something is probable (because it is
logical or normal).
Henry ought to be here soon — he left home at six.
‘We're spending the winter in Miami.’ ‘That ought to be nice.’

ought tohave ...
We can use ought + perfect infinitive to talk about the past. This
structure is used to talk about things which did not happen, or which
may or may not have happened (see 202.3).

| ought to + have + past participle |

| ought to have phoned Ed this morning, but | forgot.
Ten o'clock: she ought to have arrived at her office by now.
For the differences between ought, should and must, see 295.

233 own

We only use own after a possessive word.
It's nice if a child can have his own room.
(NOT ... @frewn-reen-)
I'm my own boss.

Note the structure a ... of one’s own.
It’s nice if a child can have a room of his own.
I'd like to have a car of my own.

We can use own without a following noun.
‘Would you like one of my cigarettes?’ ‘No thanks. | prefer my own.’