Should and ought have more or less same meaning in present day English and can be used interchangeably. Should, however, is more common than ought. Both should and ought are used to suggest obligation.

Examine the following two sentences carefully:

John said: "I am going away on Wednesday."

John said that he was going away on Wednesday.

The first sentence above is an example of "Direct speech" because the words of the speaker are given exactly as spoken. The second sentence is an example of "Indirect speech" because the words of speaker are not given as spoken but are given indirectly.

Still is an indefinite adverb of time, meaning "even yet" or "even up to the present time." It thus indicates some continuing action. Like most indefinite adverbs of time, still generally precedes the main verb.

Because English is not an inflected Language, it makes limited use of case or word endings to convey meaning. English word order thus becomes important; it is also more rigid than in most foreign Languages. Normal word order in English is as follows:

The future perfect tense is used to describe an action which, at a certain point in future time, will be considered a past and completed action.

Though some verbs in English are always followed by infinitives, certain verbs may be followed by either gerunds or infinitives. The following common verbs belong to this group: