Describes something that happened in the past that is finished. – I went to Heihe for Chinese New Year
进行时
Describe actions that weren’t finished that happened over a period of time in the past. – Last month, I was trying to get a new job.
Describe actions that were changing in the past – Last year, the world was still coming out of recession.
完成时
Describes something that started in the past, refers further back to the past and then continues up to the first point in the past – In 2010, I have lived in China for five years.
Describes predictions – It will be a nice day tomorrow
Describes the desire or willingness to do something – George says he will help us
进行时
Describes plans and intentions – I will be driving to work today
to indicate that a longer action in the future will be interrupted by a shorter action in the future – I will be waiting for you when your bus arrives
完成时
Expresses the idea that something will occur before another action in the future. It can also show that something will happen before a specific time in the future.