| and, or | and adds an idea, or gives a choice; usually no comma before them | I like tea and coffee. / Do you want tea or coffee? |
| but, so | but contrasts, so gives a result; usually a comma before them | I like tea, but I don't like coffee. / I'm tired, so I go to bed. |
| because | gives the reason; a clause follows | I'm tired because I work late. |
| A2when, before, after | a time clause; the present simple talks about the future | When I arrive, I'll call you. |
| A2also, too | also goes before the main verb and after be; too goes at the end | I also speak French. / I speak French too. |
| B1however | starts a new sentence; a comma follows | It was raining. However, we went out. |
| B1so that | gives a purpose; a clause follows | I left early so that I could catch the bus. |
| B1unless | unless means if … not | We stay in unless it stops raining. |
| A2Trap | because of is followed by a noun | We stayed in because of the rain. |
| B1Trap | although joins two clauses and replaces but | Although it was raining, we went out. |