bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776160', position: 'atf' }}, She needn’t have come. { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, The perfect infinitive has the following structure: (to) have + past participle.. { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, Give. { bidder: 'appnexus', params: { placementId: '11654156' }}, Most verbs have an active infinitive form, with or without ‘to’: Examples: To catch, to help, to do, to wash. { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_leftslot' }}, I strike. bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162050', zoneId: '776358', position: 'atf' }}, { bidder: 'sovrn', params: { tagid: '446381' }}, 'min': 3.05, dfpSlots['topslot_b'] = googletag.defineSlot('/2863368/topslot', [[728, 90]], 'ad_topslot_b').defineSizeMapping(mapping_topslot_b).setTargeting('sri', '0').setTargeting('vp', 'top').setTargeting('hp', 'center').addService(googletag.pubads()); He is struck. { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_Billboard' }}, "sign-in": "https://dictionary.cambridge.org/us/auth/signin?rid=READER_ID", { bidder: 'sovrn', params: { tagid: '446382' }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_MidArticle' }}, Click on the arrows to change the translation direction. { bidder: 'ix', params: { siteId: '195465', size: [300, 250] }}, type: "html5", googletag.pubads().setTargeting("cdo_tc", "resp"); { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_leftslot' }}]}, { bidder: 'ix', params: { siteId: '195467', size: [300, 50] }}, { bidder: 'ix', params: { siteId: '195451', size: [300, 250] }}, bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162050', zoneId: '776358', position: 'atf' }}, { bidder: 'ix', params: { siteId: '195451', size: [300, 50] }}, 'min': 8.50, if(!isPlusPopupShown()) Active Infinitive: I do not want to drive in a foreign locale, I prefer taxis. { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_rightslot' }}, { bidder: 'ix', params: { siteId: '195451', size: [300, 250] }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_Billboard' }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_topslot' }}]}, Passive perfect infinitive: to have + been + past participle This sonnet seemsto have been writtenby Shakespeare. { bidder: 'openx', params: { unit: '539971065', delDomain: 'idm-d.openx.net' }}, "authorizationFallbackResponse": { { bidder: 'sovrn', params: { tagid: '387233' }}, userIds: [{ name: "unifiedId", }], params: { "sign-out": "https://dictionary.cambridge.org/us/auth/signout?rid=READER_ID" The chemical is placed in a test tube and the data entered into the computer. Thou art struck. (⇒ See B1+ Grammar » The passive with reporting verbs) They are believed to be lovers. googletag.pubads().setTargeting("cdo_ei", "perfect-infinitive-with-to-to-have-worked"); It can refer to events which did happen in the past or to events that might have happened (but did not happen): bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776156', position: 'atf' }}, (passive continuous infinitive, rarely used) This sonnet must have been written by Shakespeare. It is also called the present passive infinitive. // FIXME: (temporary) - send ad requests only if PlusPopup is not shown }, We use the perfect infinitive after verbs such as claim, expect, hate, hope, like, love, prefer, pretend: He pretended to have lost her number and so had been unable to contact her. 'cap': true { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_rightslot' }}]}, The road is being repaired (unimportant agent). (or He pretended that he had lost her number …). { bidder: 'sovrn', params: { tagid: '346688' }}, var mapping_rightslot = googletag.sizeMapping().addSize([746, 0], [[300, 250]]).addSize([0, 0], []).build(); I'm Seonaid and I hope you like the website. { bidder: 'ix', params: { siteId: '195467', size: [320, 100] }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_topslot' }}]}, } } googletag.pubads().collapseEmptyDivs(false); { bidder: 'openx', params: { unit: '539971080', delDomain: 'idm-d.openx.net' }}, { bidder: 'appnexus', params: { placementId: '11654208' }}, googletag.pubads().setTargeting('cdo_alc_pr', pl_p.split(",")); 'min': 0, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, The perfect passive infinitive is formed from the fourth principal part—in the example, laudatus, plus "esse." ga('send', 'pageview'); Add ${headword} to one of your lists below, or create a new one. googletag.pubads().set("page_url", "https://dictionary.cambridge.org/grammar/british-grammar/perfect-infinitive-with-to-to-have-worked"); I don’t have to go to the newsstand because the paper (deliver) to our house every day. { bidder: 'openx', params: { unit: '539971065', delDomain: 'idm-d.openx.net' }}, { bidder: 'sovrn', params: { tagid: '387232' }}, var pbMobileHrSlots = [ type: "html5", simple present|main clause is in the simple present, signal words: every day; When Kylie went to school, she (pick up) by her parents every day.  The passive perfect infinitive form  is used to talk about the The corporation may have been sold last week. The passive perfect infinitive form is used to talk about the past. ), careful when using money or food, or (of a meal) cheap or small in amount, Cambridge Dictionary’s Word of the Year 2020, Clear explanations of natural written and spoken English. { bidder: 'openx', params: { unit: '539971063', delDomain: 'idm-d.openx.net' }}, var pbDesktopSlots = [ { bidder: 'sovrn', params: { tagid: '446381' }},