时态复习一、一般现在时1、构成：是以动词原形表示的，当主语是第三人称单数时，作谓语用的动词原形后要加s 或es2、功用（1）表一直发生的事，重复发生的事，客观事实或真理。 The earth goes around the sun. The sun rises in the east. Two and two is four.(2)表习惯性，经常性动作 I go to Britain every year. I often spend two years watching TV after finishing my homework in the evening.(3)谈论时间表、旅程表、国籍等 What time does the film begin? The train leaves Beijing at 9:15 and arrives in Shanghai at 6:30 the next morning.(4)时间状语从句、条件状语从句中，主句是将来时，从句用
