1. This sentence has no subject. All you need to do is insert the subject in front of the rest of the sentence: “I am” or ” I was” or “XY Z Corporation is” or “Dr. Jane Doe is” or “State University is”

2. OK as is.

3. This starts out with a sentence fragment. Again, you need a subject, but this fragment also needs a verb. I think the comma needs to be replaced with a conjunction such as “and” or “or”. Depending on what the subject is, it could need to be “Bluetooth system, or TMC system design. Without a subject, it’s impossible to say which is correct. The second sentence has a problem with subject and verb agreement. It’s either “product….is” or “products…are”. If you are British, “learnt” is all right, but if you’re American or Canadian, “learned” is correct. In either case, the phrase “learnt knowledge” is awkward. I’d substitute “facts” or “data” for “knowledge”. “Circuit” should be “circuits”.

4. Another sentence fragment with no subject. Are you talking about yourself here? If so, change “as well as” to “I am”.

5. This sentence fragment makes so little sense I’m having a hard time figuring out what you want to say. The obvious problem is, again, a lack of subject of any kind. I think you need to review the difference between active and passive voice in writing sentences. Is this a school assignment or part of your CV? Everythng in a CV should be written in active voice. Don’t imply what you can do or have done, state it confidently. If this is going on your CV, this is how it should read: While employed by XYZ Corporation, I systematically tested SIIF’s GPS module and designed MTK’s GPS module. I have working knowledge of WI-FI modules, Bluetooth TMC and DVB migration television. I have no idea what “the front porjects about consumption” might mean. but never use “and so on” in a CV. Be more specific.

It’s really hard to try to modify the fragments, without seeing the complete sentences first.

1. I mainly engaged in the developing of system designs consisted of a portable GPS navascope classified as consumer, debugger, and a prototypical manufacturer

2.The device hardware design is the main design project where GPS module uses ATMEL.

3.proof and design of Bluetooth system, the TMC system design. The product above is being launched in a large scale production. I learned the knowledge related to high frequency circuit.

4. I am proficient in using LNA, SAW, front end processor, RF, electric circuit PCB design, wiring knowledge, ADS An Chiehlun, as well as able to carry on the radio frequency simulation

5. Systematically tested SIIF’s GPS module, designing MTK’s GPS module, understanding WI-FI module, blue tooth TMC, DVB migration television, and similar projects about consumption.

Number 2 is the only actual sentence. Number 1 lacks a subject and is merely a descriptive phrase. In number 3, the first phrase has no clear subject and no verb. It simply makes no sense as written. In the next sentence a plural verb, are, is used for a singular subject, product. It should be, “The products listed above are just strating to be produced on a large scale. Learnt should be learned, and this phrase has no connection to the sentence before it. A clearer way of saying it would be,”I am knowledgeable about high frequecy circuits.” Number 4 seems to be an attempt at describing one’s prficiency. Try, “I am proficient using LNA, SAW and the front end processor. I am knowledhgeable in PCB design, wiring, ADS, Chielun, and radio frequency simulation.” I cannot decipher number 5. It sounds like a description of testing procedures or a statement about having tested the listed systems. “and so on the ront projects about consumption makes absolutely no sense.