在There is always something happening.这句话中happen为什么要加ing

there is som tea in the cup 对som tea的提问 有首歌叫There's som什么的 He is always there to There is always someone是什么意思 there is always a way At night there is a MM willing to and I walked through the night market?Som There [is和was】som water in the bottle just now选哪个 There are som ( )(diffrent)between them where there is love,there is always a where there is a will ,there is always的意思 here there is love are always wishes Because she is always there to listen There is always only one truth! There is always only one truth There is always just ONE TRUTH! There is always just one Truth! There is always sunshine in my Be yourself always ,there is no one