In general, speech acts are acts of communication. To communicate is to express a certain attitude, and the type of speech act being performed corresponds to the type of attitude being expressed.For example, a statement expresses a belief, a request expresses a desire, and an apology expresses a regret.s an act of communication, a speech act succeeds if the audience identifies, in accordance with the speaker's intention, the attitude being expressed. Some speech acts, however, are not primarily acts of communication and have the function not of communicating but of affecting institutional states of affairs.
Press down on the gear shift to put the motorcycle into first gear. This only works if you are in neutral or second gear, otherwise, pressing down the gear shift will only take you to a lower gear. Move the gear shift upwards to reach the remaining gears.
How does a phoropter work (mechanically)? There seem to be some really neat gear/clutch mechanisms at work throughout the device, what are the actual mechanisms involved? For instance, how does the axis adjustment knob adjust all the astigmatic lenses and the cross cylinder at the same time? Or how does the fast sphere knob work?