Revisamos la tarjeta de sustitución.

Revisamos is the first-person plural form of revisar, so it means we review / we check / we inspect.

A very important point: this form can mean either:

• present tense: we review / we check
• preterite past: we reviewed / we checked

For regular -ar verbs, the nosotros form is the same in the present and the preterite:

• revisamos = we review or we reviewed

So you need context to know which one is meant.

Spanish often leaves out subject pronouns because the verb ending already tells you who the subject is.

Here, -amos shows that the subject is we. So:

• Revisamos la tarjeta de sustitución.
• Nosotros revisamos la tarjeta de sustitución.

Both are grammatical, but the version without nosotros is more natural in many situations.

You would usually add nosotros only for emphasis, contrast, or clarity.

La is the definite article, meaning the.

Spanish usually uses an article when talking about a specific noun, so la tarjeta means the card. In this sentence, it sounds like a particular card is being referred to, not just any card.

Also, Spanish often uses articles in places where English might sometimes leave them out. So using la here is completely normal.

In Spanish, it is very common to use noun + de + noun to describe the type or function of something.

So tarjeta de sustitución literally means something like:

• card of replacement
• more naturally in English: replacement card

This structure is very common in Spanish:

• tarjeta de crédito = credit card
• gafas de sol = sunglasses
• centro de salud = health centre

Spanish does sometimes use adjectives too, but de + noun is often the most natural pattern.

Yes, tarjeta sustitutiva is possible, but it may sound more formal, technical, or context-dependent.

In many cases, tarjeta de sustitución feels more straightforward as a label for a card used as a replacement. The de + noun structure is often the safest and most natural choice for learners.

So:

• tarjeta de sustitución = very natural
• tarjeta sustitutiva = possible, but more adjectival and less neutral in some contexts

Both nouns are feminine:

• la tarjeta
• la sustitución

Tarjeta is feminine, so it takes la.

Sustitución is also feminine. Many nouns ending in -ción are feminine:

• la información
• la solución
• la sustitución

Only tarjeta needs an article here, because sustitución is part of the phrase de sustitución and is not the main noun of the sentence.

The accent mark shows where the stress falls.

Sustitución is stressed on the last syllable:
sus-ti-tu-CIÓN

Without the accent mark, Spanish spelling rules would normally make you stress it differently. So the written accent tells you the correct pronunciation.

This is also very common with nouns ending in -ción:

• información
• nación
• solución
• sustitución

A rough pronunciation in standard Peninsular Spanish is:

reh-bee-SAH-mos lah tar-HEH-tah deh soos-tee-too-THYON

A few notes:

• v in revisamos is pronounced very similarly to b in Spanish.
• j does not appear here, so there is no strong throaty sound in this sentence.
• In most of Spain, the c in -ción is pronounced like English th in think, so sustitución ends roughly like -thyon.
• In Latin American Spanish and some parts of Spain, that sound may be more like s.

Not usually in the English sense of rewrite or edit.

Spanish revisar most often means:

• to check
• to inspect
• to review
• to look over

So in this sentence, revisamos is more like we check / we review / we inspect, not normally we revise in the sense of changing a draft.

This is a very common false friend for English speakers.

Yes, but the version you have is the most neutral and standard:

Revisamos la tarjeta de sustitución.

This is basically:

• verb
  • object

because the subject we is understood from the verb.

You can change the order for emphasis, but that changes the feel of the sentence:

• La tarjeta de sustitución la revisamos.
  This puts emphasis on the replacement card.

For everyday neutral Spanish, the original sentence is the best pattern to remember.