1 现在进行时.通常用"now".

形式： be + verb +ing

eg: I am(not) doing my homework.

You/We/They are(not) reading.

He/She/It is(not) eating.

动词 -ing 的形式

Most verbs +ing walk-walking

Verbs ending in e -e + ing come-coming

Short verbs ending in a vowel + a consonant run -running swim-swimming