vil
Key Member
- Joined
- Sep 13, 2007
- Member Type
- Student or Learner
- Native Language
- Bulgarian
- Home Country
- Bulgaria
- Current Location
- Bulgaria
Dear teachers,
Would you be kind enough to revise the usage of the Perfect Infinitive with modal vebs in the following sentences?
He must have finished his experiment.
It is possible that some of the products isolated may have resulted from the alkylation of others.
The only product isolated was 1’3-diphenilpyrazole, although the 1’5-isomer may also have been present.
The route may have been followed in reactions 4, 5, 6.
The third hydroxyl group originally present must have combined with the aldehyde group to form a lactol ring.
When an equimolecular mixture of the two was heated, product VII was found to be free from radioactivity after rigorous purification, i.e. the allylic group in VII must have been derived solely from VI.
They poiny out that the ester must have undergone acyloxygen fission.
The three phenylitungstic acids must have been polymeric.
Thank you for your efforts.
Regards,
V.
Would you be kind enough to revise the usage of the Perfect Infinitive with modal vebs in the following sentences?
He must have finished his experiment.
It is possible that some of the products isolated may have resulted from the alkylation of others.
The only product isolated was 1’3-diphenilpyrazole, although the 1’5-isomer may also have been present.
The route may have been followed in reactions 4, 5, 6.
The third hydroxyl group originally present must have combined with the aldehyde group to form a lactol ring.
When an equimolecular mixture of the two was heated, product VII was found to be free from radioactivity after rigorous purification, i.e. the allylic group in VII must have been derived solely from VI.
They poiny out that the ester must have undergone acyloxygen fission.
The three phenylitungstic acids must have been polymeric.
Thank you for your efforts.
Regards,
V.