80
11.12 active and passive form with and without infinitive 1. The infinitive is used after the passive form (but not after the active)
with the following verbs assume, believe, hypothesize, imagine, suppose, think . These verbs all express some kind of opinion or reasoning.
2. When the verbs listed in Rule 1 are used in the active, a different construction is required (
that + noun + verb inactive form.
3. If the subject
of the passive form is it , then the same construction as in Rule 2 is required.
PASSIVE ACTIVE NO 1,2 The value of x
is assumed to be equal to 1. Web assumeb that the value of x
is equal to 1.
Web assumeb the value of x to be equal to 1.
1,2 This tree
was believed to have supernatural powers. They
believed that this tree had supernatural powers. They believe
to have found the answer.
3,1 It
was thought that the answer was known. They
thought they knew the answer. They
thought to know the answer.
3,1 It
was assumed that the problem had been resolved. Web assumedb that
we had already resolved this problem.
Web assumed to have already resolved this problem.
11.13 active form verbs not used with the infinitive The following verbs are not followed by the infinitive in the active form
believe, realize, think .
Instead use this formula verb + (that) + pronoun + suitable tense YES NO We
believe (
that) we are the first to have revealed this discrepancy. Web believe to be the first to have revealed this discrepancy. Web realizedb (
that) we had this problem only a month ago. Web realized to have this problem only a month ago. She
thought (
that) she was right. She
thought to be right.
