Choose the right SAT verb tense and form: keep tenses consistent, resolve tricky subject-verb agreement, and match verbs to their true subjects.
in 1994 / last year → simple past; ever since / so far → present perfect; now / currently → present.
Find the clue word before you read the choices.
has/have + past participle for an action that began in the past and reaches to now.
had + past participle; triggered by "by the time," "before," or "already."
Cross out "of ___" phrases and flip inverted sentences; match the verb to the true subject.
The verb agrees with the nearer subject.
Verb questions on the SAT Reading and Writing section test three things at once: whether the tense fits the timeline the sentence lays out, whether the verb agrees in number with its true subject, and whether the right form of the verb is used. You are never asked to name a tense — only to pick the verb that makes the sentence work. The good news is that the sentence almost always tells you which verb it wants, if you read its clues instead of trusting your ear.
Every verb sits somewhere on a timeline, and the sentence plants markers that fix the moment. Words like yesterday, in 1994, and last spring pin the action to a finished point in the past and call for the simple past (studied). Words like ever since, over the past decade, and so far describe something that started in the past and reaches to now, which is the job of the present perfect (has studied, have studied). The phrase by the time almost always signals two past events, one before the other. And now, currently, and these days keep you in the present (studies).
The single most common error is answering by feel and ignoring these markers. Train yourself to find the time cue first, decide what tense it demands, and only then look at the four choices. In The lighthouse has guided ships into the harbor ever since it ___ in 1887, the main clause is already present perfect, but the blank belongs to "since it ___ in 1887" — a specific past year — so it takes the simple past was built. A dated point is finished, even when the sentence around it stretches to the present.
When a sentence stacks two past actions and you need to show which happened first, the earlier action takes the past perfect (had + the past participle). In By the time the surveyors arrived, the river ___ its course, the arriving is one past moment and the river's shifting happened before it; the earlier action becomes had changed. The clue words by the time, before, and already are your signal that one past event needs to step back behind another. Simple past for both would blur an order the sentence is deliberately spelling out.
Agreement is easy until the SAT shoves the subject far from the verb, then dangles a decoy noun right where the verb goes. The verb always agrees with the subject, never with a noun that merely sits closest.
Beyond tense and agreement, watch that the verb's form fits. A sentence that lists parallel actions should keep them in the same form: The intern was filing reports, answering phones, and greeting visitors — not greet visitors. And a verb that follows a helping word needs the right partner: would have arrived, never the mistaken would of arrived. These are quiet errors your ear may wave through, so check that every verb in a series matches and that helping verbs pair with a real participle.
At no point did you have to label a tense. You read the sentence's own signals — a date, an "ever since," a "by the time," a hidden subject — and let them choose the verb.
Choose the verb: "The crate of antique tools ___ far too heavy for one person to lift."
Choose the verb: "These days, the observatory ___ its telescope to visitors every clear Friday evening."
Choose the verb: "Ever since the trail reopened, hikers ___ the ridge in record numbers each autumn."
Choose the verb: "By the time the inspector arrived, the tenants ___ every trace of the leak."
Choose the verb: "Either the stagehands or the lighting director ___ responsible for resetting the props between acts."
Choose the verb: "Although the factory closed in 1998, the surrounding town ___ steadily ever since, drawing new families each year."
Matching the verb to the nearest noun instead of the true subject across an interrupting phrase.
Cross out phrases like "of antique tools," then match the verb to the head noun that remains.
Ignoring timeline clues and choosing a tense by ear.
Find the cue first — "ever since" wants the present perfect, "by the time" wants the past perfect — and let it decide.
Treating "there is / there are" as agreeing with "there."
"There" is never the subject. Locate the real subject after the verb and match the number to it.
With "either... or" or "neither... nor," defaulting to plural or to the first subject.
The verb agrees with the nearer subject; flip the two subjects and the correct verb flips too.
Which choice completes the text so that it conforms to the conventions of Standard English?
The collection of rare coins that the museum acquired last spring ______ now on display in the east wing.
Which choice completes the text so that it conforms to the conventions of Standard English?
Geologists had catalogued the site for years before the earthquake, so by the time the survey team arrived, the landscape they expected ______ dramatically.
Which choice completes the text so that it conforms to the conventions of Standard English?
The harbor light has guided vessels past the reef every night ever since the keeper first ______ it in 1889.
Which choice completes the text so that it conforms to the conventions of Standard English?
In the archive’s bottom drawer ______ a bundle of letters that no researcher had examined in over fifty years.
Which choice completes the text so that it conforms to the conventions of Standard English?
Either the two lab assistants or the professor ______ responsible for calibrating the spectrometer before each experiment.
Which choice completes the text so that it conforms to the conventions of Standard English?
Although the mill shut down in 1974, economists ______ its lingering effect on the region only in the past decade.
Choose the verb that matches the real subject of an SAT sentence by ignoring interrupting phrases, handling "or/nor," collective nouns, and inverted word order.
Fix SAT pronoun-antecedent agreement, pronoun case, and dangling or misplaced modifiers by matching words to the nouns they truly refer to.
Fix SAT comma splices, run-ons, and fragments by learning when to use periods, semicolons, colons, commas, and dashes between clauses.