Words joined to a Singular Subject by with, together with, in additionto, or,as well as etc. are parenthetical, and therefore do not affect thenumber of the Verb.
1
When the Subject of the Verb is Relative Pronoun care should be
taken to see that the Verb agrees in Number and Person with the
Antecedent of therelative.
2
Ask, advise, allow, command, force, forbid, invite, encourage,compel, beg, order•, imagine, instruct, permit, persuade, tell, require,remind, teach,etc. are followed by Object + To +V2
3
Two auxiliaries can be used with one principal Verb, only when theform ofthe principal Verb is appropriate to both the auxiliaries.
4
When there is only one auxiliary to two principal Verbs itshould becorrectly associated with the both.
5
A Past Tense in the main clause should be followed by a PastTense inthe subordinate clause.
6
A Past Tense in main clause may be followed by a Present Tense inthe subordinate clause when the subordinate clause expresses auniversaltruth.
7
When the subordinate clause comes after 'lest', the auxiliary Verb'should'must be used, whatever be the Tense of the Verb in the mainclause.
8
Gerund if preceded by a Pronoun, that Pronoun mustbein Possessive case.
9
The Present Perfect Continuous Tense is used for an action thatbegan inthe past time and is still. going at the time of speaking~ It isused with, Adverbials of time introduced by 'since', 'for' and 'how long.
10
A Verb when preceded by a Preposition must be the Gerund.