when we can use that and when we can take it out

[Mhalattab]

Hi, Teacher
I have two questions. First one which I have not found an answyer for a long time, is about when I can use that in a sentence and when I can take it out. Secondly I found a sentence which included two verbs what kind of a sentence is it grammerly: Smart machines will also help identify medical conditions

appreciating your efforts.

Best Regards
Mohammed Al-attab

[probus]

Hello Mohammed. To your first question, consider this example.

1. There is something about this I do not like.
2. There is something about this that I do not like.

If this is the kind of that you are talking about the answer is that, almost always, it makes no difference. You can use that or leave it out, as you like. There are some slight higher level considerations, but that is the basic answer.

I've not been able to understand your second question. Try to rephrase it.

[magdalena]

It isn't any special kind of a sentence. Sometimes sentences have two verbs:
I WANT to HAVE a drink.
I love sleeping.
I can't drive.
I stopped smoking.

As you can see, the main verb changes according to a tense, while the second verb stays the same.
I want to have a drink now.
I wanted to have a drink yesterday.

However, there is a trick: there are verbs after which you have to put to + INFINITIVE like in the examples above, after other verbs you have to put just infinitive:

Let me go!

Smart machines will help identify ....

and after some verbs you must add -ing to verb (such a verb is called gerund)

I like swimming.

You may want to google: verb + gerund, verb+ infinitive, verb + object + to + infinitive - to find more about it. Add 'esl' at the end of your search to make sure that you get the best results (esl stand for English as a second language)

http://wps.ablongman.com/long_faigle....cw/index.html