Bare Infinitive usage

1) He made her (to) type up the letter.

2) We saw her (to) wash the dishes.

Q1) Why should we use bare infinitive in these sentences ?

Q2) Is there any difference in meaning between with (to) and without (to) in the sentence?

3) We helped him get on a taxi.  <->  We helped him to get on a taxi.

Q1) Is there any difference in meaning between with (to) and without (to) in the sentence?

Thanks for your help.

Regards, Terry

Clive,

In my understanding, there's no special reason why bare infinitive is used in the sentence. And it's standard usage.

Is it correct ??

Thanks a lot. Terry

Use the bare infinitive, not the full infinitive, after forms of the verbs make, let, have, see, hear, watch, listen to, feel and an object.

Use either the bare infinitive or the full infinitive after forms of help and an object (with no difference in meaning).

We can go.  We should go.

We made him go.  We let them go.  We had them go.  We saw them go.  We heard them sing.  We listened to her sing.  We felt the floor shake.

They helped us load the car.  They helped us to load the car. 

Nddad

Why should we use bare infinitive in these sentences ?

CJ