| a | Jack wondered whether [PRO] to trust Jill. |
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| | subject control |
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| | |
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| b. | The electrician promised the owner of the flat [PRO] to do a good job. |
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| | subject control |
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| | |
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| c | The teacher told the student [PRO] to register for the course next semester. |
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| | object control |
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| | |
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| d | It is important [PRO] to keep your word. |
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| | ambiguous between arbitrary and subject control interpretation: it can mean that it is important for the listener to keep their word or the clause can be understood to have a generic interpretation, it is important for people in general to keep their word. |
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| e | I am glad [PRO] to be back home. |
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| | subject control |
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| f | [PRO] To err is human. |
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| | arbitrary control |
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| | |
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| g | Mary tried [PRO] to feed the elephants. |
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| | subject control |
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| | |
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| h | The teacher plans [PRO] to write another study on causatives. |
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| | subject control |