Comparatives are used to compare and clarify the difference between two nouns. In other words, comparative adjectives are used when two persons or objects being compared.
When an adjective compares three or more things, the superlative form of the adjective is used. Superlatives indicate that the quality or quantity is at its highest or is most intense.
The front position: before the subject of the sentence. It gives information in advance, to set the scene for the action that follows.
The mid position: the adverb in this position is intimately connected with the verb, generally placed immediately before it. If there is an auxiliary verb, the adverb is placed between the auxiliary and main verb (She resolved she would neversee him again.); In case there are two, it is placed between them (This operation has never been performed in this country.). If there is a negative auxiliary, the adverb normally goes after the negative element (We don’t usually go to restaurant on Sundays.), but we can emphasize negation by placing the adverb just before it (She probably won’t meet him.).
The end position: at the end of the sentence.
The most common types of adverb and their position in clause:
Unless is similar in meaning to if not and can be used instead of if not in certain types of conditional sentences. Like if, unless is followed by a present tense, a past tense, or a past perfect tense.
For example:
You will not gain high score in IELTS exam unless you learn English every day. (You will not gain high score in IELTS exam if you do not learn English every day.)
He wouldn’t be late for the train unless he forgot his luggage. (He wouldn’t be late for the train if he did not forget his luggage.)
Unless I had walked in the rain last week, I wouldn’t have been sick. (If I had not walk in the rain last week, I wouldn’t have been sick.)
We cannot use unless in questions:
What will you do if you do not pass this final exam? (NOT: What will you do unless you pass this final exam?)
We don’t use will or would in the clause after unless:
Unless we leave now, we can be late. (NOT: Unless we will leave now, can be late.)
