Expletive constructions combine
it or
there with the verb
be.
| There were 50 participants in the experimental group and 47 in the control group. |
They can be useful sometimes because they allow you to emphasize information by positioning it after the verb in focus position. However, the verb
be is often followed by a relative clause that increases the length of the sentence unnecessarily.
| It is this proposal that solves the problem most effectively. |
| There are some natural polymers that have cationic properties. |
In both examples above, the expletive construction and the relative clause can be removed and the idea expressed with a more concise subject-verb-object structure.
| This proposal solves the problem most effectively. |
| Some natural polymers have cationic properties. |