4th Grade Subordinating Conjunctions Worksheets

Fourth graders work the fuller set (since, unless, though) and sharpen the contrasts: because versus although is the reason-versus-surprise fork, until versus while splits the timing. Reading the whole sentence before choosing is the skill; the conjunction is the label the logic demands.

Free printable PDF, aligned to Common Core L.3.1.h. One skill per page, answer key on page two.

Every sheet is one of a kind and prints with a version code, so you can reprint the exact same one later. New version every click.

The kind of sentences you'll get

Circle the letter of the joining word the sentence's logic needs.

______ the siren sounds, move your car to the side. While · If · Although
Answer: If
Grandma hums ______ she waters her tomatoes. while · unless · because
______ the museum was crowded, we saw every exhibit. If · Although · Because

Every print draws a fresh mix of sentences at this level, so a make-up test or a second sibling gets a different sheet.

What's on each sheet

Choose the word. Circle the letter of the joining word the sentence's logic needs. 10 questions per page.

Every version prints on US Letter or A4, with its answer key on the last page.

How to teach this

The productive struggle at this level is because versus although. Ask: does the second half follow naturally from the first (because), or does it push back against what you'd expect (although)? "Although Kenji practiced daily, he felt nervous" earns its although from the surprise. Add unless as if's negative twin once the core set is steady.

Watch for: Each conjunction names a different relationship, so they aren't swappable: because gives a reason, although signals a surprise, until marks time. Starting a sentence with because is fine, as long as the main idea follows: 'Because it rained, we stayed in.'

Common questions about subordinating conjunctions

How do students pick between because and although?: By expectation. If the second half is what you'd predict from the first, the link is because: it rained, so indoors. If the second half defies the setup, it's although: practiced daily, yet still nervous. One question, expected or surprising, settles it.
Why does "since" cause trouble?: It moonlights: since can mean because (since you're here, help me) or mark time (since Monday). Our practice items use it only in the causal sense to keep answers clean, and the time job stays with until, before, and after where it's unambiguous.

Related worksheets

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Aligned to Common Core L.3.1.h. Reviewed by the One More Sheet curriculum team. Content version 68, updated July 2026.