The spokeswoman for the national laboratory announced that, while the

[quote="tia2112"]The spokeswoman for the national laboratory announced that, while the lab had been operating at a loss in the 1990s, it had become profitable in 2006, and would continue to yield high profits at least until 2025.



A)had been operating at a loss in the 1990s, it had become profitable in 2006, and would continue
B)had been operating at a loss in the 1990s, although becoming profitable in 2006, and will continue ----- although becoming profitable in 2006 --- INCORRECT
C)had been operating at a loss in the 1990s, it became profitable in 2006, continuing ---- continuing ---- INCORRCECT
D)operated at a loss in the 1990s, becoming profitable in 2006, then would continue ---- becoming profitable in 2006 ---- INCORRECT
E)operated at a loss in the 1990s, becoming profitable in 2006, and continuing ---- becoming profitable in 2006, and continuing ---- INCORRECT

That leaves with option A

A)had been operating at a loss in the 1990s, it had become profitable in 2006, and would continue
looks good. past perfect is ok, since the SW announced - already in the past, and she describes something that happened before she announced.
would continue - perfectly fine to describe a future event in the past.

B)had been operating at a loss in the 1990s, although becoming profitable in 2006, and will continue
will continue - incorrect.

C)had been operating at a loss in the 1990s, it became profitable in 2006, continuing
continuing - ing modifier that modifies the clause - this is illogical to use here. the fact that it became profitable in 2006 will result in high profits at least until 2025? no.

D)operated at a loss in the 1990s, becoming profitable in 2006, then would continue
becoming now acts as an ing modifier. the fact that the lab operated at loss in 1990 resulted in becoming profitable in 2006? this is non-sense.

E)operated at a loss in the 1990s, becoming profitable in 2006, and continuing
same as in D.

A is the best.

A is the best choice indeed but I wonder if the comma before "while" is essential.

The spokeswoman for the national laboratory announced that, while the lab had been operating at a loss in the 1990s, it had become profitable in 2006, and would continue to yield high profits at least until 2025.

Here the main sentence is
The spokeswoman for the national laboratory announced that it had become profitable in 2006, and would continue to yield high profits at least until 2025.

- This is the core intention of author that he wanted to express

The part while the lab had been operating at a loss in the 1990s - is acting as a modifier here which is giving some additional information about the earlier performance. So it is with in , .... , structure.

The spokeswoman for the national laboratory announced that, while the lab had been operating at a loss in the 1990s, it had become profitable in 2006, and would continue to yield high profits at least until 2025.

---, while the lab had been operating at a loss in the 1990s, --- Is this just an inessential info or a required necessary info? Let’s remove the part and see.

The spokeswoman for the national laboratory announced that it had become profitable in 2006, and would continue to yield high profits at least until 2025.

It looks as though the original intent has been lost after removing the modifier. That the lab had made a loss in the 1990s is essential to stress that this is a case of a turn-around. A turn-around in a corporation's lifespan is a very important aspect, which goes into the evaluation of the company’s fundamentals. Therefore, I feel that the comma after 'that' could have been a typo or a slip rather than intended or even a mistranscription

wrong question

many times, the native speaker use had done wrongly
had done never go with a specific time in the past . look back grammar books to know this point

what the part that daagh has highlighted?if you remove the dependent clause starting with while the sentence doesnt convey what it should.

I am not clear about query. If you are inquiring about the verb tense in the dependent clause, past perfect continuous is alright because if the announcement were in present tense then the tense of the verb "operate" within the announcement would be past continuous - because the statement is in past the tense within the announcement has been taken "one step backward".

Isn't the "it" in option A an infringement on parallelism?

We have a list of two verbs:

The spokeswoman announced that, while the lab had been operating at a loss in the 1990s, it (a) had become profitable in 2006, and (b) would continue to yield high profits at least until 2025.

The it is "outside" the list. For example:

While she is known for X, she is also a P and a Q.

The P and Q are not connected to X, and the word she is not part of the list.

I would request help here.

The spokeswoman announced that, (a) while the lab had been operating at a loss in the 1990s, (b) it had become profitable in 2006, and (c) would continue to yield high profits at least until 2025.

(a) I understand is non-essential clause.
(b) The use of it is required

(c) But for this section why there is comma before and. If there is a comma then the part after and should be an independent clause.

Can some one help me understand it?

Hi milanrajb,

Not every , and will introduce an independent clause. Generally, we should not consider comma "rules" (except for issues like comma splices) to be very reliable.