A Sample sentences. Ш First of all, let me describethe main parts of the system to you.

Ш First of all, let me describe the main parts of the system to you.

Ш They explained the operation of the software to the audience and then demonstrated it.

Ш Obviously I prefer the new model to the old one.

Ш They have spent a fortune on developing a very safe working environment.

B Form

Object + prepositional verb phrases take two forms:

1 verb +	object + preposition	+ prepositional object
protect us	from	unfair competition
2 verb +	object + preposition	+ Ving
prevent us	from	entering the Japanese market

C Uses

A list of the more common examples of object + prepositional verb:

congratulate smb on sth	advise smb of/about smth	compare smb/sth with sth/smb
accuse smb of sth	convince smb of sth	describe sth to smb
divide/cut/split sth into sth	prefer smb/sth to smb/sth	prevent smb/sth from sth
interest smb in sth	do sth about sth/smb	explain sth to smb
remind smb of sth	provide smb with sth	protect smb/sth from smb/sth
spend money on sth	tell smb about sth

Notes

1. The preposition from is used after 'disabling' verbs such as:

prohibit restrain forbid prevent ban veto stop

They prevented us from exporting the goods.

2. The 'enabling' verbs, on the other hand, take an object + infinitive. Enabling verbs are:

allow authorise help permit enable encourage

They helped us to export the goods.

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