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‘Not sure if it is.’ (NOT + non-finite or ellipted clause)

Let’s look at the most common examples of non-finite or ellipted claused used after ‘not’. Usually, we would say: I am not sure if it is possible. But we can remove the subject and verb to make an ellipted clause: Not sure if it is possible. We can also say: This is a petrol car …

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present perfect continuous questions

In the English Grammar Profile, B1 point 31 in the category of PAST is defined: present perfect continuous: QUESTIONS with a limited range of verbs. Note that questions are generally low frequency in the CLC probably due to lack of spoken data. *Also note that there are no other entries for ‘range of verbs’ PELIC …

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before | after + VERBing

In the English Grammar Profile, B1 point 61 in the category of CLAUSES is defined as: non-finite subordinate clause with ‘before’ and ‘after’ + ‘-ing’, before or after a main clause, to refer to time. Another way to say this is: ‘after + gerund’ or ‘before + gerund’ Also, note that this point will clash with …

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Verb + VerbING

Point 29 in the category of verbs/patterns is B1 and defined as: limited range of verbs followed by an ‘-ing’ form. Point 56 in Verbs/patterns is B2 and defined as an increasing range of verbs followed by an ‘-ing’ form. A search for _VV _VVG in iWeb corpus: 1 KEEP GOING 656012 STARTED USING 54040 …

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