43 Expressing cause, effect and purpose 253
43.1 Enquiring about cause 253
43.2 Giving reasons and expressing relationships of cause
and effect 254
43.3 Other ways of expressing relationships of cause and effect 256
43.4 Enquiring about purpose 257
43.5 Expressing purpose 258III Putting events into a wider context
44 Expressing knowledge 263
44.1 Expressing knowledge of a fact 263
44.2 Saying that one knows a person, a place or an object 264
44.3 Expressing knowledge of a subject or a skill 264
44.4 Getting to know, become acquainted with or
meeting someone 264
44.5 Learning or finding out about something 26545 Remembering and forgetting 266
45.1 Saying whether one remembers something or someone 266
45.2 Asking people whether they remember something
or someone 268
45.3 Saying that one has forgotten something or someone 270
45.4 Enquiring whether someone has forgotten something or
someone 27146 Expressing obligation and duty 272
46.1 Expressing obligation and duty with regard to oneself
and others 272
46.2 Enquiring whether one is obliged to do something 274
46.3 Expressing obligation in an impersonal way 274
46.4 Other ways of expressing obligation and duty 27447 Expressing needs 276
47.1 Expressing needs with regard to oneself and others 276
47.2 Asking people about their needs 278
47.3 Expressing needs in an impersonal way 279
47.4 Expressing strong need 28148 Expressing possibility and probability 282
48.1 Saying whether something is considered possible
or impossible 282
48.2 Enquiring whether something is considered possible or
impossible 289xii
CONTENTS