Active-Passive Voice, Causatives Advanced Level Test – Quiz (Online Exercise With Answers) 3

The accountants are not doing the investigating; someone is investigating them, and it is happening now. So we need the present continuous passive: are being investigated. In the second gap the statements are the subject and they have made the list. The present perfect shows a recent result that matters now. Not are investigating: that is active and would mean the accountants are the investigators.

This sentence describes a general procedure, so it uses the present tense. Unless there is means 'if there isn't'. The main clause needs a passive modal, because the technique does not use itself: must be used. Not was / will be used: a past verb after unless does not go with will in a real, general condition.

In the last round refers to a finished event in the past, so we use the past simple passive: was knocked out. The boxer received the action. Not has been knocked out: the present perfect does not go with a finished past time like in the last round.

The story is in the past (was delighted). The proposal was accepted before he learned about it, so the earlier action takes the past perfect passive: had been accepted. A proposal is accepted by someone, so it must be passive. Not accepted alone: his proposal accepted has no auxiliary and is not a correct passive.

An inquiry is carried out by someone, so we need a passive: be carried out. After It is believed that, wouldn't expresses the expected outcome, a prediction about what will not happen given the circumstances: wouldn't be carried out. Given here means 'considering'. Not wouldn't carry: that is active and would mean the inquiry itself carries something out.

If you really want to solve the problem shows that this is a necessity, so we need must. The shape of the world is not doing anything; you take it into account, so the verb is passive: must be taken into account. Not must take: that is active and would mean the shape of the world takes something into account. Not had to be taken: the sentence is about the present.

In the first gap, digital memories are the subject that does the enabling, so it is active: can enable, meaning 'are able to make possible'. In the second gap the 'compelling fashion' is something people keep for the rich. It is the receiver of the action, and until now signals the present perfect: has been reserved. Not has reserved: that is active and has no object.

The question is about a country now (Is it possible…), so the present tense is needed. Three plural subjects (beauty, history, variety) are joined together, so we use the present simple passive: are combined. Not were combined: the past tense does not fit a question about a present situation.

The newspaper got the copy at a past moment, and the copy received the action, so the past simple passive is needed: was obtained. Result in is an active verb meaning 'lead to' and is never used in the passive, so the report's prediction is will result in. Not will be resulted: result cannot be passive.

After the suggestion that, English uses should + base verb (or a subjunctive). The Memex is designed by people, so the form is passive: should be designed. In the relative clause he (Bush) is the subject who described the thinking, so the active past simple is needed: described. Not was described: the subject he did the describing.

Thus far (= so far) calls for the present perfect. The machine itself passed the tests, so the first verb is active: has passed. The phrase by our engineers shows the machine received the second action, so it is passive: has been evaluated. Not has been passed: a machine passes tests, the tests don't pass it.

A theory is described with the present simple, as the parallel clause the aim of treatment is shows. Neurosis receives the action (complexes cause it), so we need the present simple passive: is caused by. Not causes: that is active and would make neurosis the cause.

This is a general medical rule, so the present simple is used. The antibiotics receive the action, so it is passive: aren't given. The second gap describes women in a current temporary situation, so the present continuous is natural: are breastfeeding. Not weren't given: the past tense does not fit a general rule that is still true.

Besieged by means 'surrounded by many people wanting something'. He received the action, so the past simple passive is needed: was besieged. In the relative clause the immigrants did the assuming, so it is active past simple: assumed. Not was assumed: the immigrants are the subject, not the receivers of the action.

This sounds like a research report describing the past procedure. Researchers scored the responses, so it is passive: were scored. People attributed the behaviour to a cause, so the second verb is also passive: was attributed to. Not were scored / attributed: the behaviour attributed to is active, and behaviour cannot do the attributing.

Belong is a state verb. It is not used in continuous or passive forms, so we say belonged. By the end of this year signals the future perfect. The antiques receive the action, so the future perfect passive is needed: will have been sold. Not are belonged: belong cannot be passive.

Mortals receive permission from the gods, so the passive is needed: than mortals were allowed. After want + object we use a to-infinitive. The influence is known by people, so it is a passive infinitive: wanted his influence to be known. Not to known: after to we need the base form be + past participle.

This is a general rule, so the present simple is used. Attendance is counted by the school, so the passive is counted fits. The key gap is the second one. Courses are used by students as credits, so we need a passive modal: could be used as credits. Every option with an active second verb (might use, should use) is wrong, because courses do not use anything themselves.

Emerge (= appear, come into existence) is intransitive, so it is never passive: emerged. Consider in the pattern be considered to be must be passive, because people consider the Sumerians to be the first civilization: were considered. Not were emerged: intransitive verbs have no passive form.

The pattern be believed to be is passive, because people believe it about KIBS, and the present simple fits a current view: are believed. In the second gap are is shared and left out, so only the past participle is needed: (are) described as. Not have believed: that is active and would mean KIBS do the believing.

A trial is held by a court, so the verb must be passive. Was to be held (be + to-infinitive) describes something planned or arranged in the past. All the other options are active and would mean the trial holds something.

Date back to means 'have existed since a certain time'. It is an active verb in the present simple, because the buildings still exist: date back. The ceremonial centre was in that place in the past, and be located is passive: was located. Not had located: that is active, and a centre does not 'locate' anything.

Prefer is followed by a to-infinitive. The patients receive the care, so we need a passive infinitive: to be cared for. The second gap describes the same general present situation, so are is right: while they are with their beloveds (= loved ones). Not to care: that is active and would mean the patients care for someone else.

The singular subject is a set. The measures were taken by the authorities, and the result matters now, so the present perfect passive fits: has been taken. After the modal can we use the base form: roam free (= move around freely). Not has taken: that is active, and measures do not take anything themselves.

The pattern be considered to be is passive, and a present general belief needs the present simple: is considered. Concern oneself with (= take an interest in, get involved in) is active and needs a reflexive object, so with a habit we say doesn't concern himself. Not isn't concerned: the passive cannot be followed by himself.