VERB FORMS
Which is valid and why?
We've see that film
We've seen that film
We've seen that film is valid
have (present) + seen ('perfect' 3rd form)
('have' + base form/infinitive is ungrammatical)
The relationship with the teachers were more friendly.
The relationship with the teachers was more friendly.
The relationship .... was more friendly.
('relationship' is the subject of the verb - so, 'was'; 'teachers' is plural, but is not the subject of the verb)
(or, 'The relationshipS .... were more friendly')
Have you ever think about the difference between private and state school?
Have you ever thought about the difference between private and state school?
Have you ever thought about ......
('have' - present, +' thought', 3rd form;
have + base/infinitive is ungrammatical
correct the following:
One of the most serious problem faced by big cities is pollution.
One of the ....... problemS
After have doing that, they just forget everything.
After having done that, they just forget everything.
After have done that, they just forget everything.
After having done that, they just forget everything.
(have + 3rd form - perfect form; 'after' is a preposition and takes the -ing form of the verb)
NB the main clause is 'they just forget everything'
They are the same exactly words I said.
There isn't a properly answer to this question.
exact words (or, exactly the same words)
proper answer
Some could failed the exams
Some could fail the exams
could fail (modal verb + base form - always!)
ACTIVE: could study, could be studying, could have studied, could have been studying
PASSIVE:(be + third form) could be studied, could have been studied .....
Annual exams only give students one chance to prove _____________ (THEM)
themselves
How people's school experience have shaped their views
How people's school experience has shaped their views
has shaped their views
('experience' is the subject - singular - that pesky 3rd person singular 's' ....)
A great many magazine and article .......
... the same attitude of a military adults
plural nouns required
'a' + singular noun