[Grammar] conditional clauses

[jelena cvetak]

I have few conditional sentences to solve ,but I cant. Please ,I need help.

Here they are:
If you read this book,you _____(understand)what I mean.
It would be better If she _____(not come) now.
IF my watch _____(not be) slow ,we would have arrived in time.
They will hear better If he _____(speak)louder.
If he left earlier,_____he catch .
If you read this book you will ____(see) what I mean.
If the car ____(not break) down,we would have arrived on time.
Did David written a letter last night?

Thanks in advance.

[bhaisahab]

Originally Posted by jelena cvetak

I have few conditional sentences to solve ,but I cant. Please ,I need help.

Here they are:
If you read this book,you _____(understand)what I mean. would understand/will understand
It would be better If she _____(not come) now. didn't
IF my watch _____(not be) slow ,we would have arrived in time. had not been
They will hear better If he _____(speak)louder. speaks
If he left earlier,_____he catch . this is meaningless
If you read this book you will ____(see) what I mean. see
If the car ____(not break) down,we would have arrived on time. had not broken
Did David written a letter last night? write

Thanks in advance.

Bhai.

[konungursvia]

The meaningless one probably has an omission:

If he left earlier, would he catch the bus?