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19 Mar 2017, 23:26
Kudos
Bookmarks
I am generally confused when I see "of which", "in which" or "for which" instead of the plain and simple "which" as a relative clause.
For example:
Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.
In this example, why can't we use a simple "which" in place of "of which"? And in general what rules govern the usage of:
1. Of which
2. In which
3. For which
4. In that
For example:
Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.
In this example, why can't we use a simple "which" in place of "of which"? And in general what rules govern the usage of:
1. Of which
2. In which
3. For which
4. In that
19 Mar 2017, 23:29
Kudos
Bookmarks
I am generally confused when I see "of which", "in which" or "for which" instead of the plain and simple "which" as a relative clause.
For example:
Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.
In this example, why can't we use a simple "which" in place of "of which"? And in general what rules govern the usage of:
1. Of which
2. In which
3. For which
4. In that
I am new to the forum, and would like to see an expert reply on this topic, as I tend to struggle when I see the above usage.
For example:
Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.
In this example, why can't we use a simple "which" in place of "of which"? And in general what rules govern the usage of:
1. Of which
2. In which
3. For which
4. In that
I am new to the forum, and would like to see an expert reply on this topic, as I tend to struggle when I see the above usage.
20 Mar 2017, 00:47
Kudos
Bookmarks
@e-GMAT. Look forward to your response.
