ACTIVE AND PASSIVE VOICES. The voice of verb shows whether the sentence is active or passive. The sentence is active if an action is performed by the subject, and the sentence is passive if an action was performed on the subject .
Active : Subject + verb (type I)
Passive : Subject + verb to be + verb (type III)
Active : Subject + verb to be + verb (type I) + ing
Passive : Subject + verb to be + being + verb (type III)
Active : Subject + have/has + verb (type III)
Passive : Subject + have/has + been + verb (type III)
Change the following sentences into passive voice or active voice. Please look carefully on the verbs used.
Read the following passage carefully and identify the verbs in passive voice.
Crop Protection Using Chemical Dusts
The problem of applying chemicals for crop protection is greater than of spreading fertilizers. This is because a very small amount of active ingredient has to be applied to a large crop area, often to a particular part of the plant where it can be most effective. These active materials are formulated for application in a number of ways. However, dusting is the method which will be discussed in this passage. In dusting, the finely ground active ingredient, is blended down with a local filler such as a talc or clay to give a dust, usually containing 2 – 4% of active ingredient. This can be applied to the crops by hand dusters, tractor drawn dusters that blow the dust out through a boom, aircraft, or by drift dusting. The characteristics of the finished blended dust should be determined by the method of application. However, in the tropical area such as Indonesia, there is a limited choice of fillers.