reva
reva
A majority of observers interviewed see the Middle East as unstable at present but that it will, or could, become less volatile in the future.
A)that it will, or could,
B)that it would, or could,
C)it will be or could
D)believe that it will be or could
E)think the Middle East would or could
can anyone please help to solve this
but in D could is also used which is past form of verb and in E COULD AND WOULD are parallel. please correct me if i am wrong
Yeah, it's tricky. "Would" is only used for past tense or for conditional -- not for for simple present or simple future. "Could," on the other hand, can be used in the present or future tense (in addition to the past and the conditional).
For example, the sentence,
"Bill could be the ugliest person alive." is in the present and makes sense (present possibility), but
"Bill would be the ugliest person alive." is incomplete and incorrect;
for the second sentence to work we need to add a conditional or an indication that the sentence is in the past, such as, "Bill would be the ugliest person alive, if Tom, the current titleholder, died."(conditional) or "As a child, Bill had no idea he would one day become the ugliest person alive." (past tense)
So, "could" and "would" are not necessarily parallel even though they sound alike. Since this question's sentence is clearly not in the past or conditional, then "would" can not be used.
(Btw, no offense to any Bill or Tom out there)