In this exercise, we are asked to examine the underlined segment of the following sentence and to write **I** in case it is in the indicative mood or **S** in case it is in the subjunctive mood: El agricultor usó pesticidas hasta que **encontró productos orgánicos**.

In this case, the underlined segment of the sentence is an action that has already taken place and thus it is in the indicative mood.

I

In this exercise, we are asked to examine the underlined segment of the following sentence and to write **I** in case it is in the indicative mood or **S** in case it is in the subjunctive mood: El medio ambiente sufrirá mientras **no conservemos los recursos naturales**.

In this case, the underlined segment of the sentence is an action that happens often and thus it is in the indicative mood.

I

In this exercise, we are asked to examine the underlined segment of the following sentence and to write **I** in case it is in the indicative mood or **S** in case it is in the subjunctive mood: Dejaré de molestarte en cuanto **tú aprendas a reciclar**.

In this case, the underlined segment of the sentence is an action that hasn’t taken place yet and thus it is in the subjunctive mood.

S

In this exercise, we are asked to examine the underlined segment of the following sentence and to write **I** in case it is in the indicative mood or **S** in case it is in the subjunctive mood: Usan pesticidas mientras **los insectos se comen las verduras**.

In this case, the underlined segment of the sentence is an action that happens often and thus it is in the indicative mood.

I