In sentence 1 the passive infinitive is used because the meaning of the infinitive is passive. In sentence 2 the meaning is also passive, but after an adjective (easy) the active infinitive is used.
In sentence 1 the active infinitive is used after an adjective (hard). In sentence 2 there is no adjective (hardly is an adverb). In this case the passive infinitive is used.
1 to be admired
2 to wear
3 to be understood
4 to be expected
1 The key was nowhere to be found. / … was not to be found anywhere.
2 These (spare) parts are hard / difficult to get / obtain.
3 Suitable accommodation/housing for refugees was hardly to be found.
4 There is no time to be lost / to lose.
5 It was to be expected that the turnover would fall / drop.
6 She is easy to influence. / She is easily influenced.
7 It is to be feared that he has had an accident.
8 I wonder if they are to be trusted.
9 It is to be hoped that the market will recover.
10 There is still a lot of work to be done / to do.
11 It is to be recommended to make a backup every day.
12 It is to be regretted that so many employees had to be dismissed / fired / sacked.
1 I do not want everybody / everyone to know my e-mail address.
2 I prefer you to leave earlier. / I would prefer you to leave …. / I would / had rather you left …
3 I set the alarm (clock) at / for six (o’clock) in order not to oversleep / so as not to oversleep.
4 Do you prefer me to finish the minutes today. / Would you rather I finished …
5 I would like her to stay longer.
6 The management does not allow / permit us to smoke during / at meetings.
7 The wholesale trade did not allow / permit the articles / items to be sold at a lower price.
8 The Consumers’ Association did not allow / permit the test to be used for advertising purposes.
9 The old woman did not want her house to be demolished / torn down.
10 The management organised / organized a press conference to announce / in order to announce / so as to announce the merger.
11 His wife would like him to apply for a job in Amsterdam.
12 Everybody / Everyone expected the plan to be approved. / … expected that the plan would be approved.
13 I expect them to do their utmost to meet / in order to meet / so as to meet the deadline.
14 I turned down the radio in order not to disturb him / so as not to disturb him.
15 The board of directors wanted the factory / works / plant to be modernised / modernized.
16 I would love you to come and stay with us.
17 The manufacturer does not allow / permit retailers to sell this product below the recommended retail price.
18 Our French colleagues expect you to speak French during / at the meeting.
19 He wanted his car to be repaired within two days.
20 He went to Spain for a year to / in order to / so as to learn to speak Spanish.
21 The Minister of Economic Affairs did not allow / permit the price of petrol / petrol price to be raised / increased.
1 allow people to copy: After ‘allow’ a direct object + to-infinitive is used.
2 want you to do: After ‘want’ a direct object + to-infinitive is used.
3 prefer you to use: After ‘prefer’ a direct object + to-infinitive is used.
4 like the meeting to be postponed: After ‘would like’ a direct object + to-infinitive is used.
6 permit her photo to be published: After ‘permit’ a direct object + to-infinitive is used. In this case a passive infinitive because the meaning is passive.
7 prefer us to start: After ‘prefer’ a direct object + to-infinitive is used.
9 easy to solve: After an adjective (easy) the active to-infinitive is used.
10 hardly to be believed: When the meaning is passive, the passive to-infinitive is used, except after an adjective. In this sentence ‘hardly’ is an adverb.
12 to be found: When the meaning is passive, the passive to-infinitive is used, except after an adjective.
13 hot to eat: After an adjective (hot) the active to-infinitive is used.
1 you to promise me
2 my body to be cremated
3 me to do
4 you to send them
1 to be expected, 2 to be found, 3 lose / be lost, 4 be trusted