因為前面有“be”,所以后面的help要加上ing
You should all be helping each other to improve.和
You should all help each other to improve.語法上都對,前面一句的語氣更重一些.You should all be helping each other to improve.是現(xiàn)在進(jìn)行時嗎？You should all be helping each other to improve和You should all help each other to improve.這兩句意思有區(qū)別嗎？謝謝可以理解為現(xiàn)在進(jìn)行時，兩句的意思，前面說了，用be helping更加強(qiáng)調(diào)一些。