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The following are single-word prepositions that take clauses as complements. Prepositions marked with an asterisk in this section can only take non-finite clauses as complements. Note that dictionaries and grammars informed by concepts from traditional grammar may categorize these conjunctive prepositions as subordinating conjunctions.
English allows the use of "stranded" prepositions. This can occur in interrogative and relative clauses, where the interrogative or relative pronoun that is the preposition's complement is moved to the start , leaving the preposition in place. This kind of structure is avoided in some kinds of formal English.
English prepositions are words – such as of, in, on, at, from, etc. – that function as the head of a prepositional phrase, and most characteristically license a noun phrase object (e.g., in the water). [1]
This lead Khan to start the Khan Academy Non-profit Organization in 2008 and quit his job to focus on education in 2009. To date, Khan Academy has produced over 20,000 videos [ 3 ] with over 1.7 billion views on YouTube.
The Khan Academy website also hosts content from educational YouTube channels and organizations such as Crash Course and the Museum of Modern Art. [30] It also provides online courses for preparing for standardized tests, including the SAT , AP Chemistry , Praxis Core and MCAT [ 31 ] and released LSAT preparation lessons in 2018. [ 32 ]
The popularity of his educational videos on the video-sharing website prompted Khan to quit his job as a financial analyst in late 2009. [24] He moved his focus to developing his YouTube channel, Khan Academy, full-time with the aid of close friend Josh Gefner. [20] Khan subsequently received sponsorship from Ann Doerr, the wife of John Doerr. [25]
If is an English preposition, as seen in If it's sunny tomorrow, (then) we'll have a picnic. As a preposition, if normally takes a clausal complement (e.g., it's sunny tomorrow in if it's sunny tomorrow). That clause is, within the conditional construction, the condition (or protasis) on which the main clause (or apodosis) is contingent.
This flexibility continues into early Middle English, where it seems to drop out of usage. [31] Shakespeare's plays use OV word order frequently, as can be seen from this example: "It was our selfe thou didst abuse." [32] A modern speaker of English would possibly recognise this as a grammatically comprehensible sentence, but nonetheless archaic.