Here is a list of 20 conjunctions that start with S, running from “Since” to “Since then.” It includes single words like “so” and “still,” as well as longer phrases like “so long as” and “save that.” These words and phrases help you give reasons, set conditions, show contrast, and put events in order. You can use them to connect your ideas smoothly in essays, emails, and everyday conversation.

Conjunctions are words or short phrases that join words, clauses, or sentences and show how ideas connect. Many English teachers use the mnemonic FANBOYS to remember the seven coordinating conjunctions, and “so” is one of them. The S group is unusually varied, because it also includes conjunctive adverbs like “still” and “similarly.”

Below you’ll find the table with the conjunction, its definition, an example of usage, and a short description.

Conjunction: The word or phrase itself, listed so you can quickly spot the connector you need and see how it is spelled.

Definition: A short explanation of what each conjunction does and its type, so you know whether it joins clauses or links sentences.

Example usage: A sample sentence that shows the conjunction in a real context, which you can copy or adapt in your own writing.

Description: Extra notes on tone, common uses, and similar words, so you can tell when a conjunction sounds formal, casual, or old-fashioned.

Conjunctions

ConjunctionDefinitionExample usage
SinceA subordinating conjunction that introduces a reason or marks the time from which something has been true.Since it was raining, we stayed inside.
SoA coordinating conjunction that joins a result or consequence to what came before it.The store was closed, so we went home.
So thatA subordinating conjunction that introduces the purpose or intended result of an action.She spoke slowly so that everyone could follow.
So long asA subordinating conjunction that introduces a condition that must be met.You can borrow my car so long as you fill the tank.
So far asA subordinating conjunction that introduces the extent or limit of a statement.So far as I know, the meeting is still on.
So much so thatA subordinating phrase that introduces an extreme result of the degree just described.It was cold, so much so that the lake froze solid.
Seeing thatA subordinating conjunction that introduces a reason based on a known fact.Seeing that you are already here, you may as well stay.
Seeing asA subordinating conjunction that introduces a reason based on a known fact.Seeing as it’s your birthday, dinner is on me.
SupposingA subordinating conjunction that introduces an imagined or hypothetical situation.Supposing we miss the train, what then?
Supposing thatA subordinating conjunction that introduces an imagined or hypothetical situation.Supposing that she says no, we need a backup plan.
SupposeA subordinating conjunction, often used at the start of a sentence to introduce a hypothetical condition.Suppose you won the lottery, what would you do?
SaveA conjunction meaning “except” or “but,” introducing an exception to a statement.He told no one, save his brother.
Save thatA subordinating phrase that introduces an exception or qualification to what was just stated.The plan was perfect, save that nobody had the keys.
StillA conjunctive adverb that introduces a contrast, meaning “nevertheless” or “even so.”It was risky. Still, we decided to go.
SimilarlyA conjunctive adverb that shows that two ideas or situations are alike.Cats are carnivores. Similarly, dogs eat meat, though they also eat plants.
SubsequentlyA conjunctive adverb that shows one event happened after another.He applied in May and subsequently received an offer.
Such thatA subordinating phrase that introduces a result or a defining condition.The rules are written such that anyone can follow them.
Sooner thanA subordinating phrase that expresses a preference for one thing over another.I’d walk home sooner than ask him for a ride.
SayA subordinating conjunction used informally to introduce an example or an assumption.Say you had a week off, where would you go?
Since thenA conjunctive phrase that links an earlier event to everything that has happened from that time on.He moved abroad in 2015. Since then, he has visited twice.

Descriptions

Since
One of the most flexible conjunctions in English. It can give a cause, like “because,” or point to a starting time, like “from the time that.”
So
A short, everyday connector that shows cause and effect. It is one of the seven FANBOYS conjunctions and almost always follows a comma when joining two full clauses.
So that
Used to explain why someone does something. It links an action to its goal and is common in instructions, explanations, and formal writing.
So long as
A phrase conjunction meaning “provided that.” It sets a condition and is slightly more casual than “provided that” or “on condition that.”
So far as
Often used to hedge a claim by limiting it to what the speaker knows or can judge. It is a close cousin of “as far as.”
So much so that
Used to stress how strong a condition was by showing a dramatic outcome. It usually follows a statement and adds emphasis.
Seeing that
Works like “since” or “because,” but suggests the reason is obvious or already known to everyone involved. It is common in spoken English.
Seeing as
An informal version of “seeing that.” It introduces a reason the speaker treats as plain and obvious, and appears mostly in conversation.
Supposing
Used to ask what would happen in a possible scenario. It works like “if” but invites the listener to think about the consequences.
Supposing that
A slightly longer, more formal form of “supposing.” It sets up a hypothetical condition, usually followed by a question or a plan.
Suppose
Used to open a what-if question or a proposal. It is commonly followed by a clause, and sometimes by “that.”
Save
An old-fashioned word that survives mostly in formal or literary writing. It marks the single exception to what was just said.
Save that
A formal way to say “except that.” It adds a detail that slightly weakens or limits the main statement.
Still
Links two ideas where the second holds true despite the first. It usually opens a sentence or clause and is followed by a comma.
Similarly
Used to connect a new point to an earlier one by pointing out a resemblance. It is common in essays and comparisons.
Subsequently
A formal word for “afterward” or “later.” It orders events in time and is frequent in reports, news writing, and academic prose.
Such that
Used in formal and technical writing to describe how something is arranged or defined. It is also common in mathematics.
Sooner than
Introduces the option the speaker would reject. It works like “rather than” and is used mostly in spoken or informal English.
Say
A casual way to start a hypothetical, similar to “suppose.” It is mostly found in spoken English and informal writing.
Since then
Connects a past point in time to the present or a later period. It is common in storytelling, news, and personal updates.
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