This sort of structure is called a double negative, but in effect it shows affirmation.

What should I do if I become depressed while studying abroad?

I don't think that they are valuable just because they have a large crop, but I'm glad when they sprout in great numbers - even when they are poison mushrooms.

Of course you can't say that it's worth nothing because it isn't perfect, so that doesn't mean that GTD is useless.

The relative pronoun 'that' has two states, a nominative case and objective case, but there is no possessive case.

Two weeks after being admitted to hospital my acne suddenly started to disappear.

With verbs there are intransitive verbs that don't take an object, and transitive verbs that do take an object.

A complete intransitive verb takes neither complement nor object.

There are grammar books that call these sorts of things, not modifiers, but adjuncts (A).

The example is a past progressive tense sentence. How was everybody taught when they were learning about progressive tense?