Common Errors With Conjunctions

conjunction is merely a connecting word. It has no other function in the sentence. In most languages of European origin, clauses are joined together by conjunctions in similar ways. However, students who speak non-European-type languages often experience some problems in using English conjunctions correctly.

One conjunction for two clauses

One conjunction is enough to join two clauses.

Correct use of some conjunctions


Unless means if not, so it will be superfluous to introduce another not into the following clause.


Lest means that… not, and, therefore, it will be wrong to add another not in the following clause. Moreover, it should be noted that the only auxiliary verb that can be used after lest is should.

Than, as and that

Than is used after comparative adjectives and adverbs. As and that are not used after comparatives.


As is used in comparisons of equality’. Than and that are not used in this way.