Tenses

She has worked hard.

She is going to work hard.

She is working hard.

He is studying now to pass the exam.

He has been studying now to pass the exam.

He stadies now to pass the exam.

He studied now to pass the exam.

They were being to several countries.

They had been to many countries.

They were to many countries .

the dog had barked loudly yesterday

the dog has barked loudly yesterday

the dog was barking loudly yesterday

The birds were singing very beautifully when I woke up.

The birds had sang very beautifully when I woke up..

The birds have sang very beautifully when I woke up.

The birds sang very beautifully when I woke up.

It is going to rain tomorrow.

It rains tomorrow.

It rained tomorrow.

I was finishing my work before he arrived.

I have finished my work before he arrived.

I had finished my work before he arrived.

I finished my work before he arrived.

I wait for your call

I am going to wait for your call

I will wait for your call

I will be waiting for your call

I will be writing a letter to my parents.

I write a letter to my parents.

I will write a letter to my parents.