27 Egg
I was surprised by the news. [Hewings,1999:58] In passive sentence the point of interest can be other information such as time, place, manner or instrument. Ego
The gas should be lit with a match. [1994:132]
II.3.3. Passive sentence without an agent Ina passive sentence we mention the agent only if it is important information. There is often no need to mention it. Egg
Nine million cigarettes are smoked. There is no need to say that nine million cigarettes are smoked by smokers allover the world. So we do not need use by + agent.
[1994:132] Sometimes we don’t know, or don’t know exactly, or have forgotten who did the action.
Egg
: The minister was murdered. Thomson, 1986:266] In spoken English we often use a subject such as people, somebody, they, we or you even we don not know who the agent is.
Informal English, particularly writing, we often prefer to use a passive. Egg
The new computer system is being installed next month.
[Hewings, 1999]
II.3.4. Typical contexts for the passive We can use the passive in speech, but it is more common in writing, especially in impersonal style of textbook and reports. Eastwood, 1994:133]